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Rainbow Bridge World

​たからものはふつうの日

 Children’s Book Illustration Project

 A story about the quiet value of ordinary days.

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ABOUT THE PROJECT

About

This picture book was created to gently remind us of something we often forget—
that ordinary days are, in fact, irreplaceable.

Inspired by a real story of a child living with illness,
the project carries a quiet message:


to live fully in the present moment,
and to recognize the beauty in what seems “normal.”

“今を生きることの尊さ”
“ふつうの日の価値”

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Title Page
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Character Design

The characters were designed to hold emotional clarity and softness.
Each expression and posture was carefully explored

to create a sense of safety and presence.

Petra

Petra is a gentle and curious young squirrel whose warm heart and earnest nature guide her through each discovery, inviting readers to see the world with childlike wonder.

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Koto & Ito

Koto and Ito are lively twin squirrels who support Petra with their playful energy—always eager to help, explore, and brighten every moment they share

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Stationmaster

The Stationmaster is a calm, kind hippo who watches over Petra and the town with the warmth of a gentle guardian, offering quiet support whenever it’s needed

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Rainbow Bridge World

Illustration Process

Each illustration was developed through a gentle, layered process:
from rough emotional composition,
to refined structure,
to final color that supports the atmosphere of the story.

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Rough Sketches

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Refined Scketches

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Color

Rainbow Bridge World

Book Cover

The cover illustration was created to gently draw the reader in,
balancing warmth, stillness, and emotional depth.
The title and front cover typography were designed to harmonize with the illustration,
supporting a calm and inviting visual tone.

Front
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Back
Cover

Rainbow Bridge World

Endpaper

Multiple endpaper variations were explored to find the right emotional tone.
Color choices were carefully considered to support the overall experience of the book.

Starry Night

Koto and Ito are lively twin squirrels who support Petra with their playful energy—always eager to help, explore, and brighten every moment they share

Starry Night

Koto and Ito are lively twin squirrels who support Petra with their playful energy—always eager to help, explore, and brighten every moment they share

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