What platforms is Jantei Monogatari on?

Jantei Monogatari was released on Sega Mega Drive/Genesis, Turbografx-16/PC Engine CD.

When did Jantei Monogatari release?

Jantei Monogatari was first released on October 9, 1990.

Jantei Monogatari

Oct 9, 1990Quiz/TriviaSega Mega Drive/GenesisTurbografx-16/PC Engine CD

Jantei Monogatari — frequently asked questions

What platforms is Jantei Monogatari on?: Jantei Monogatari was released on Sega Mega Drive/Genesis, Turbografx-16/PC Engine CD.
When did Jantei Monogatari release?: Jantei Monogatari was first released on October 9, 1990.

About Jantei Monogatari

Jantei Monogatari is a hybrid of a traditional-style Japanese adventure game and a regular mahjong game. The player takes the role of the unnamed private investigator, and moves from place to place via menus, talking to different characters. The investigation happens through playing mahjong with each suspect: win and they'll tell you a bit more of what they know. At first, the investigator can only speak with the three girls in the photo, but as he wins games of mahjong against them, he gains information and experience that allow him to find new clues and talk to more suspects. The investigator will need to play against a dozen different opponents in his attempt to find out what happened to the kidnapped girl.

Summary via IGDB.

Game details

Developer: Atlus Co., Ltd
Publisher: Renovation Game

Details via IGDB.

Every version compared

Prices, contemporary reception and the studio credited for each release

Platform	Year	Loose	Complete	Sealed	Fake risk
Sega Genesis	1991	$13	$42	—	Low

Also released on: Sega Mega Drive/Genesis · Turbografx-16/PC Engine CD. We haven’t priced or authenticated those versions yet.

Collector value & authenticity

Sega Genesis · PriceCharting sold data · Verified 2026-10-29

Loose

$13

few sales

Complete

$42

few sales

Sealed

—

How often it sells

Loose: about once a year
Complete: about once a year
Sealed: rarely — fewer than one recorded sale a year

Prices marked “few sales” rest on about one recorded sale a year, so treat them as a rough guide: the next copy could sell well above or below. Expect to wait for one to come up.

Sales frequency from PriceCharting's completed-sale records, as of 2026-10-29.

Price over time

Loose
Complete

A loose copy sold for about $9.07 in Oct 2021, and $12.54 as of Oct 2026.

Show as table

Month	Loose	Complete
Jan 2022	$9.07	$18.14
Jan 2023	$8.83	$18.01
Jan 2024	$12.54	$18.14
Jan 2025	$12.54	$18.14
Jan 2026	$12.54	$42
Oct 2026	$12.54	$42

Monthly price estimates from PriceCharting's completed-sale records, sampled quarterly, through Oct 2026.

Release record

Territory	Date	Product number
Japan	29 March 1991	T-49033

Source: Product numbers: MAME's Mega Drive software list and the No-Intro serial records in the libretro database, published where both agree on the same cartridge dump, or from the libretro records alone where MAME lists no number for that dump. Board and ROM numbers: MAME's software list

Region: JP
Released: 1991
Authenticity: Low

Modern re-releases, such as Sega Ages, the Genesis Mini and Nintendo Switch Online, are not tracked hereLow counterfeit risk

Sega Genesis prices, all games & how to spot a fake

A Japan-only mahjong-and-adventure game, for buyers who can enjoy the genre in Japanese.

Jantei Monogatari, known in English as Jantei Story, mixes an adventure with mahjong. You play a detective looking for a lost girl, and the story advances as you win rounds of mahjong against various female opponents. It came out on the PC Engine in Japan in 1990, and this Mega Drive version followed in Japan on 29 March 1991. Atlus and Telenet Japan developed it and Renovation Game published it.

Before you buy

Japanese cartridges are a different shape from Western ones and do not fit a Western console without an adapter or removing two plastic tabs in its slot. Among Japan-only carts it sits below the middle.