A real mystery set in Fukuoka, Japan.

Kamiya Detective Agency: High School Girl Vanished in The Summer

Kamiya Detective Agency
High School Girl Vanished in The Summer

WISHLIST NOW ON STEAM

The Steam Store page is now open! Add the game to your Wishlist and stay tuned for the 2026 release.

[May 26, 2026] Read our Press Release regarding "Kamiya Detective Agency: High School Girl Vanished in The Summer" Steam Store Reveal

STORY

Story Overview

July 2025, Fukuoka, Japan.
Kengo Kamiya, a 29-year-old former police detective, has finally opened his long-awaited detective agency near Hakata Station.
It was then that his very first client walked through the door.

―― "My daughter, Saki, has gone missing. Please find her."

On the day of the school closing ceremony just before summer break, a high school girl vanished.
The police treated it as a simple runaway case with no signs of foul play, choosing to wait and see.
But as detective Kamiya dives into the investigation, disturbing rumors and videos surrounding her emerge, turning the situation upside down.

MOVIES

Official Trailer

Official PV

CHARACTERS

Main Characters

Detective / Boss

Kengo Kamiya

The head of the agency, a former police detective (29). He excels in calm, logical deduction, but his newly opened agency currently has zero clients. He is notably handsome.

Assistant / PR Manager

Hikaru Omuta

A 19-year-old assistant. Standing at a petite 140cm (actual 139cm), her small stature occasionally gets her mistaken for a child. A gamer with a bit of an otaku streak, she openly expresses her affection for Kamiya. She is currently updating X to promote the agency.

Missing Girl / Gyaru

Saki Namihana

The 17-year-old high school girl who went missing. She adopted a "Gyaru" subculture a year ago, altering her social circle. She vanished on the day of the closing ceremony right before summer break.

Client / Mother

Mariko Namihana

Saki's mother. Conservative and prone to worry, she deeply loves her daughter despite struggling with the widening gap between them. She hires Kamiya to investigate the disappearance of her daughter.

THE AGENCY

About the Agency

Just an 8-minute walk from Hakata Station, a room inside a 40-year-old apartment building—Genest Hakata-East.
This is the "Kamiya Detective Agency," run by detective Kengo Kamiya and his assistant Hikaru Omuta.
A few months after opening, the first request arrived at their quiet office.
It was the mysterious disappearance of a high school girl.

Real photos of Fukuoka and AI-generated graphics express a highly realistic world.
Players will challenge the mystery from the perspective of Detective Kamiya.
You must spot the contradictions hidden behind testimonies and rumors.
Layer your reasoning from fragmented information to uncover the absolute truth.

TIPS The Secret of the Surname "Kamiya" (Fact & Fiction)

During the early stages of development, the protagonist's surname "Kamiya" was originally going to be written with the typical kanji characters "神谷". However, since the game is set in Fukuoka, we decided to change it to "神屋" in honor of Kamiya Sotan (神屋宗湛), one of the three great merchants of Hakata during the Sengoku period.

This naming reflects the developer's subtle respect and dedication to Hakata's rich history.

By the way, Kamiya Sotan has absolutely zero relation to the mystery of the missing high school girl.

* Note: In Japanese, our agency and protagonist's name are easily misspelled with homophonic kanji like "神谷探偵事務所", "神谷憲悟", or "神屋憲吾". The correct kanji characters are "神屋探偵事務所" (Kamiya Detective Agency) and "神屋憲悟" (Kengo Kamiya), capturing the historic merchant heritage of Hakata.

PRODUCT INFO

Game Details

Title: Kamiya Detective Agency: High School Girl Vanished in The Summer

Genre: Photoreal Novel - Mystery Visual Novel - Entertainment Mystery - Modern Japan - Detective - Choice-Based - Singleplayer

Platform: PC (Steam)

Languages: 18 Languages (Planned)
Japanese, English, Korean, Simplified Chinese, Traditional Chinese, Russian, Thai, Arabic, Portuguese (Brazil), French, German, Italian, Spanish, Polish, Indonesian, Turkish, Vietnamese, Kyushu Dialect (regional dialect of Japan)

Release: 2026

Developer: Sakura ARC