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Napping Princess (2017) Plot Summary & Timeline

Napping Princess (2017) movie poster

Napping Princess is a 2017 sci-fi and drama film directed by Kenji Kamiyama, running 1 hour 50 minutes. This page retells the whole story in 593 words (about 3 minutes to read) and covers 14 key events in order, 4 characters, where and when it is set and 3 themes. Looking for the cast, ratings and where to stream it? See the movie page for Napping Princess.

to read the plot summary
3 min
key events in the timeline
14
characters profiled
4
themes explained
3
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Napping Princess (2017) movie poster
Released
Runtime
1h 50m
Director
Kenji Kamiyama
Original language
Japanese
Studio
GKIDS
No spoilers

What Is Napping Princess About?

The premise of Napping Princess in 330 words, with nothing given away. The full story follows below.

In a Tokyo on the brink of the 2020 Olympics, daily life hums with the promise of a grand future while the streets pulse with the ordinary worries of school, family, and the looming adulthood of its youth. Kokone Morikawa, seventeen and bright‑spirited, finds refuge in the quiet moments between classes, slipping into elaborate day‑dreams where fantastical machines glide across impossible skies. The city’s sleek modernity contrasts with the soft, surreal edge of her imagination, setting a tone that feels simultaneously grounded and otherworldly.

Those reveries lead her to Heartland, a sun‑kissed realm where the love of engineering is woven with a hint of enchantment. Here, towering factories double as castles, and a youthful princess named Ancien wields a mysterious tablet that can coax steel and plastic into living creations. The atmosphere is one of wonder tinged with an undercurrent of urgency, as the inhabitants labor endlessly to craft ever‑more elaborate vehicles, hinting at deeper stakes beneath the surface of their mechanical marvels.

Back in the real world, Kokone lives with her single father, a quirky car mechanic whose hands are as skilled as his stories are elusive. Momotarō is a man of quiet dedication, his past shrouded in questions that Kokone has long sensed but never fully understood. When he suddenly disappears, the void pulls her and her longtime friend Morio into a journey that blurs the line between nap‑induced fantasy and waking reality. Their bond, forged in childhood games and shared school corridors, becomes the steady compass as they navigate clues hidden in both worlds.

The film dances between the neon‑lit streets of contemporary Japan and the pastel‑colored horizons of a dream‑crafted kingdom, inviting viewers to linger in the space where imagination fuels resolve. It is a story about searching for truth in the most unexpected places, about the quiet courage that arises when the ordinary meets the extraordinary, and about the subtle magic that can awaken when a young heart dares to follow its own wandering thoughts.

Full plot

What Happens in Napping Princess?

The complete story of Napping Princess, from the first scene to the last, in 593 words (about 3 minutes). Spoilers throughout. Names in the text link to 7 cast member pages.

Spoilers ahead

Napping Princess intertwines two distinct worlds: a near-future Japan and the magical realm of Heartland. The protagonist, Kokone Morikawa, experiences vivid dreams of Heartland during her naps. Within these dreams, Heartland is a car-centric society where the King’s castle operates as a car factory, and the populace is engaged in the relentless creation of vehicles. The King has a daughter named Ancien, who appears in her younger form in Kokone’s dreams. This resourceful girl possesses a “magic tablet” that brings to life various mechanical creations, including a blue toy dog named Joy and a motorcycle called Heart. However, the King forbids Ancien from animating Heart, seizing her tablet and confining her to a tower, as their society faces a dire challenge from the Colossus, a monstrous creature of molten metal. To combat this threat, the King constructs massive robots, but Ancien, with the help of a motorcycle-riding subject Peach, hatches a plan to defeat the Colossus, all while the King’s advisor Watanabe schemes against both the King and Ancien.

Meanwhile, in Japan, Kokone is diligently wrapping up her school year, contemplating her college options, and reconnecting with her childhood friend Morio, who has just finished his first year in Tokyo. Living with her single father, Momotarō, Kokone often reminisces about her deceased mother, questioning her father’s reluctance to share more about her. Unbeknownst to Kokone, Momotarō, a quirky car mechanic with parallels to the characters in her dreams, is implicated in a scandal just three days before the 2020 Tokyo Olympics, accused of stealing secrets from Shijima Motors. A mysterious figure resembling the King’s advisor appears at their home, searching for both the tablet and Kokone. After receiving a warning text from jail, her father instructs her not to trust Watanabe. The message includes a photograph featuring a young Momotarō, his wife, and Watanabe.

With Morio’s assistance, Kokone eludes Watanabe’s agents and recovers her stolen tablet and a teddy bear, escaping on their family’s motorcycle. The duo finds a business card for Isshin Shijima, the chairman of Shijima Motors, contemplating a visit after discovering Kokone’s mother, Ikumi, was his daughter. After a shared nap on the motorcycle, they drift into Heartland, waking to find themselves in Osaka having traveled overnight. Kokone attempts to use her tablet to contact her father, only to discover that the tablet’s powers extend to the real world when they receive Shinkansen tickets to Tokyo as if by magic. As they journey, they uncover the complicated history surrounding Ikumi, who had once worked on self-driving car technology, much to her father’s dismay.

In her dreams, Kokone finally sees herself as more than just an observer, realizing the tales of “Ancien and the Magic Tablet” recounted by her father were her mother’s stories. In Heartland, a twist unfolds as Watanabe reveals his treasonous plans to undermine the King and replace him with his robot. The King orders Watanabe’s arrest while Peach engages in a fierce battle with the Colossus, aided by Kokone and her tablet. Despite a setback triggered by Watanabe, which nearly leads to disaster, Kokone and Peach triumph in an explosive confrontation with the Colossus, both in Heartland and the real world.

As the credits roll, audiences are treated to glimpses of Momotarō and Ikumi’s love story alongside the early trials of her groundbreaking software, encapsulating their shared legacy that echoes through time. In a climactic moment, Kokone understands her name reflects the company’s motto—a beautiful fusion of “heart” (kokoro) and “wing” (hane)—and realizes that her mother’s spirit guides her, ensuring a triumphant conclusion for the Morikawa family.

Timeline

Napping Princess Timeline: Every Key Event in Order

14 key events in the order they happen, from “Kokone's Dreams Begin” to “Realizations and Conclusions”. 14 events name a place, across 5 locations.

  1. 1

    Kokone's Dreams Begin

    The story introduces Kokone Morikawa, a girl living in near-future Japan who often slips into vivid dreams of a magical realm called Heartland. During her naps, she enters this fantastical world where cars dominate society and her experiences lead her to discover the interconnectedness of her dreams and reality.

    Where:Japan

  2. 2

    Heartland's Overview

    In Heartland, the society is heavily focused on automotive manufacturing, as depicted by the King's castle which doubles as a car factory. The storyline centers around the King's daughter, Ancien, who possesses a magical tablet that enables her to animate various mechanical creations in a world threatened by a monstrous creature known as the Colossus.

    Where:Heartland

  3. 3

    The King's Decree

    The King discovers Ancien animating a motorcycle named Heart, which leads to him seizing her tablet and confining her to a tower. He believes that this action is necessary to prevent further chaos as the society faces increasing danger from the Colossus, a formidable adversary.

    Where:King's castle, Heartland

  4. 4

    Kokone's School Year

    Back in Japan, Kokone is busy wrapping up her school year and contemplating her future college options. She reconnects with her childhood friend Morio, who has just completed his first year in Tokyo, igniting memories and plans for their future together.

    Where:Japan

  5. 5

    The Scandal Unfolds

    Three days before the Tokyo Olympics, Kokone's father, Momotarō, is accused of stealing secrets from Shijima Motors. This scandal begins to unravel Kokone's understanding of her family and adds urgency to her relationship with her father, who harbors deep secrets about their past.

    When:Three days before the Tokyo Olympics Where:Japan

  6. 6

    Watanabe's Intrusion

    A mysterious figure resembling Watanabe, the King's advisor, arrives at Kokone's home searching for both the tablet and Kokone. This event marks the beginning of Kokone's realization that her dreams and her reality are colliding, creating a race against time to protect her family.

    Where:Kokone's home, Japan

  7. 7

    The Escape

    With Morio's help, Kokone narrowly escapes Watanabe's agents and retrieves her stolen tablet and a cherished teddy bear. Riding away on her family's motorcycle, Kokone begins to uncover the secrets linking her family to her dreams.

    Where:Japan

  8. 8

    Journey to Heartland

    As Kokone and Morio share a nap on their motorcycle, they mysteriously drift into Heartland while traveling overnight. They wake up in Osaka, awestruck by their travels and the enchanting atmosphere of the magical realm they dreamed about.

    Where:Osaka

  9. 9

    Discovering the Tablet's Power

    Kokone attempts to contact her father using the magical tablet, and to her astonishment, it produces Shinkansen tickets to Tokyo. This event marks a turning point where Kokone realizes the tablet's abilities extend into the real world, intertwining both realms.

    Where:Japan

  10. 10

    Ancien's Legacy

    In her dreams, Kokone uncovers that her mother's stories about Ancien and the Magic Tablet have significant meaning, connecting her past with her present. This revelation deepens her understanding of her family's history and her mother's influence.

    Where:Heartland

Show the other 4 events of Napping Princess
  1. 11

    Watanabe's Betrayal

    In Heartland, Watanabe reveals his treacherous intentions to usurp the King and his plans to create a robot army to take over. The King reacts by ordering Watanabe's arrest, leading to crucial battles that will determine the fate of Heartland.

    Where:Heartland

  2. 12

    The Battle with the Colossus

    Peach, with Kokone's aid and her tablet, confronts the Colossus in an intense showdown. Despite Watanabe's attempts to sabotage their efforts, Kokone and Peach manage to overcome the monstrous threat, showcasing the strength of their bond.

    Where:Heartland

  3. 13

    Triumph and Legacy

    As the conflict subsides, Kokone learns about her mother's legacy through romantic memories of Momotarō and Ikumi. Their love story and the innovative software Ikumi developed resonate deeply with Kokone, leaving a lasting impact on her journey forward.

    Where:Japan

  4. 14

    Realizations and Conclusions

    In a climactic moment, Kokone understands that her name symbolizes the amalgamation of 'heart' and 'wing', embodying her family's spirit and journey. This realization comes as she navigates the trials of both Heartland and her life in Japan, embracing her identity.

    Where:Japan

Characters

Who Are the Main Characters in Napping Princess?

4 characters, among them Kokone Morikawa, Ancien and Momotarō Morikawa: who each one is and the part they play in the story. Every profile links to the actor’s page.

  • KM

    Kokone Morikawa

    Played by Mitsuki Takahata

    Kokone is a determined and imaginative young woman on the verge of adulthood, grappling with her future while reconnecting with her past. She embarks on a journey that blends her waking life with her dreams of Heartland, showcasing her resourcefulness and courage. Throughout the film, Kokone evolves from a passive dreamer to an active participant in her narrative, uncovering her mother's legacy.

    • 👧 Young Adult
    • 🌌 Dreamer
    • 🚴‍♀️ Adventurous
  • A

    Ancien

    Played by Brina Palencia

    Ancien is a resourceful and spirited girl living in Heartland, characterized by her bravery and ingenuity. With her magic tablet, she has the ability to animate objects, reflecting her creativity and desire for freedom. Throughout her journey, Ancien's determination to defy the King's constraints propels her to confront formidable challenges as she seeks to protect her world.

    • 👸 Fantasy Heroine
    • 🎨 Creative
    • 💪 Courageous
  • MM

    Momotarō Morikawa

    Played by Yôsuke Eguchi

    Momotarō is Kokone's quirky father, a car mechanic akin to the characters in Kokone's dreams. His love for Kokone and the memories of his deceased wife shape his character as he navigates complex family dynamics. Although he appears lighthearted, he harbors deep secrets, his past intertwining with the narrative's mysteries.

    • 👨‍🔧 Mechanic
    • 🧩 Complex
    • ❤️ Loving Father
  • WI

    Watanabe Ichirô

    Played by Arata Furuta

    Watanabe acts as a cunning advisor to the King, characterized by his ambition and treachery. His manipulative nature adds tension to the story as he seeks to leverage his position for personal gain. Throughout the film, he embodies the conflict between loyalty and self-interest, making him a formidable antagonist.

    • ⚔️ Villain
    • 🤥 Deceitful
    • 🌪️ Ambitious
Setting

Where and When Is Napping Princess Set?

Napping Princess is set in Japan, Heartland, Osaka and Tokyo (Near-future). Here is why the time and place matter to the story.

When

Near-future

Set in a near-future scenario, the story reflects on advancements in technology, particularly in the automotive sector, against the backdrop of the 2020 Tokyo Olympics. It delves into a time when society grapples with issues like innovation versus ethical dilemmas, with Kokone's dreams offering a glimpse into a realm where magic and machinery intersect. The narrative unfolds with pressing concerns regarding familial legacies and personal aspirations.

Where

Japan, Heartland, Osaka, Tokyo

The movie traverses two unique realms: near-future Japan and the fantastical Heartland. Japan serves as the backdrop for Kokone's everyday life, featuring modern urban life and the looming presence of the 2020 Tokyo Olympics. In contrast, Heartland is characterized as a car-centric society dominated by the King's castle, which functions as a car factory. This magical realm is lively and innovative, showcasing both the beauty and challenges of technology.

  • 🏙️ City
  • 🌌 Fantasy
  • 🚗 Automobiles
Themes

What Are the Themes of Napping Princess?

3 ideas the story keeps returning to, among them Dreams, Innovation and Family.

  1. 01

    Dreams

    Dreams play a central role in 'Napping Princess,' bridging reality and the fictional world of Heartland. Kokone's vivid dreams not only serve as an escape but also guide her in uncovering hidden truths about her family and her mother's legacy. These dream sequences highlight the interplay between imagination and reality, illustrating how aspirations can shape one's journey and identity.

  2. 02

    Innovation

    The theme of innovation is woven through the narrative, showcasing advancements in technology and the implications of a car-driven society. Kokone’s mother's work in self-driving car technology and the existence of magical devices like the tablet reflect a world on the brink of technological breakthroughs. The movie prompts viewers to ponder the balance between progress and the moral responsibilities that accompany it.

  3. 03

    Family

    Family connections and legacies are pivotal themes in the film, richly portrayed through Kokone's relationship with her father and memories of her mother. The story navigates the complexities of familial bonds, especially in the face of secrets and loss. As Kokone unravels her history, it highlights the impact of family on one's identity and the generational ties that shape the path forward.

Tone & mood

What Kind of Film Is Napping Princess?

Whimsical in tone, with variable pacing and a moderate story, going by the plot summary.

Tone
Whimsical
Pacing
Variable
Story
Moderate
Intensity
Medium
Ending
Happy

A whimsical and nostalgic journey blending dreamscapes with reality, this film feels like a gentle adventure through grief and family secrets, culminating in a hopeful and emotionally resonant conclusion.

  • dreamlike
  • nostalgic
  • whimsical
  • reflective
  • bittersweet
  • adventurous
  • dreams vs reality
  • family legacy
  • coming of age
  • technological innovation

Content notes: parental death, police arrest.

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4 films close to Napping Princess in story and themes that have a full plot summary here: Paprika (2007) and Princess Mononoke (1999) lead. 1 of them comes with the ending explained.

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FAQ

Napping Princess Plot Questions

5 quick answers about Napping Princess, taken from the plot summary, character guide and setting on this page and the film’s credits.

What is Napping Princess about?

In a Tokyo on the brink of the 2020 Olympics, daily life hums with the promise of a grand future while the streets pulse with the ordinary worries of school, family, and the looming adulthood of its youth.

Read the full plot summary

When and where does Napping Princess take place?

Napping Princess is set in Japan, Heartland, Osaka and Tokyo (Near-future). Set in a near-future scenario, the story reflects on advancements in technology, particularly in the automotive sector, against the backdrop of the 2020 Tokyo Olympics.

The setting explained

Who are the main characters in Napping Princess?

The story follows Kokone Morikawa (played by Mitsuki Takahata), Ancien (played by Brina Palencia), Momotarō Morikawa (played by Yôsuke Eguchi) and Watanabe Ichirô (played by Arata Furuta).

All the characters

What are the main themes of Napping Princess?

The summary picks out 3 themes: Dreams, Innovation and Family.

The themes explained

Who directed Napping Princess?

Napping Princess (2017) was directed by Kenji Kamiyama and runs 1 hour 50 minutes.

Kenji Kamiyama’s films

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