What platforms is Osomatsu-kun Hachamecha Gekijou on?

Osomatsu-kun Hachamecha Gekijou was released on Sega Mega Drive/Genesis.

When did Osomatsu-kun Hachamecha Gekijou release?

Osomatsu-kun Hachamecha Gekijou was first released on December 24, 1988.

Osomatsu-kun Hachamecha Gekijou

Dec 24, 1988PlatformSega Mega Drive/Genesis

Osomatsu-kun Hachamecha Gekijou — frequently asked questions

What platforms is Osomatsu-kun Hachamecha Gekijou on?: Osomatsu-kun Hachamecha Gekijou was released on Sega Mega Drive/Genesis.
When did Osomatsu-kun Hachamecha Gekijou release?: Osomatsu-kun Hachamecha Gekijou was first released on December 24, 1988.

About Osomatsu-kun Hachamecha Gekijou

The game was based on the Manga/Anime series Osomatsu-kun by Fujio Akatsuka; players controlled the title character and encountered many of the series' characters in a strange (but comical) world.

Summary via IGDB.

Game details

Developer: Sega Enterprises, Ltd.
Publisher: Sega Enterprises, Ltd.
Game modes: Single player
Themes: Comedy

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	1988	$9	$22	—	Low

Also released on: Sega Mega Drive/Genesis. We haven’t priced or authenticated that version yet.

Collector value & authenticity

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

Loose

few sales

Complete

$22

Sealed

—

How often it sells

Loose: about once a year
Complete: about 2 times a year
Sealed: about once 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 $8.00 in Oct 2021, and $9.13 as of Oct 2026.

Show as table

Month	Loose	Complete
Jan 2022	$8.00	$19.00
Jan 2023	$8.00	$16.20
Jan 2024	$8.00	$18.54
Jan 2025	$9.13	$22
Jan 2026	$9.13	$23
Oct 2026	$9.13	$22

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

Release record

Territory	Date	Product number
Japan	24 December 1988	G-4005

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: 1988
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 cheerful Japan-only licensed platformer from the Mega Drive's earliest days, and an inexpensive cart.

Osomatsu-kun: Hachamecha Gekijo is a platform game made and published by Sega, released in Japan on 24 December 1988. It is based on Fujio Akatsuka's manga Osomatsu-kun and acted as a promotion for the anime adaptation that premiered the same year. You control the title character through a strange, comical world and meet many of the series' characters along the way. It came out only in Japan.

Before you buy

Among Japan-only carts it sits below the middle, so it is a cheap way into early Mega Drive software. A Japanese cart has a notch on the left and ridged edges, and it does not fit a Western console without an adapter or removing two plastic tabs in the slot.