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- H+
- H2 Interactive
- H5DEV Games
- HABE
- HaccaWorks*
- Hachigatsu Shokudou
- Hachiiro Inko
- Hachimitsu
- Hachimitsu Ichigo
- Hachimitsu Kumasan
- Hachimitsu Ringo
- Hachimitsu Soft
- Hachinoko no Sato
- Hacker International
- HACKMOCK
- Hadashi Shoujo
- Haeleth
- HAG
- Hagalaz
- Haidi Yanjiushi
- Haien
- Haiiro
- Haikara Kissa
- Haikaru
- Haikuo
- Haitoku Gikai
- Hako Ni Go Itai Production Committee
- Hako Solo Translations
- Hakubai
- Hakudakukei
- Hakuo gakuen
- Hakura0
- Hakusoto
- Hakutou
- Hakutouka
- Halca
- HaleyBopComet
- half
- Half Moon Punch
- Halfstar
- Halftone Studios
- HAL Laboratory
- Hamasaki Hanhuazu
- HAMAYARAWORKS
- Hamham Soft
- Hammerheads
- HAMSTER Corporation
- Hanabi Media
- Hanabira
- Hanabirakun
- Hanabira Project
- HanabiWorks
- Hanae Novels
- Hanagedou
- Hanaji Koubou
- Hanako Games
- Hanakojika
- Hanamaru
- hanarenmei
- Hanataba Translation
- Hanayuki
- Hanbaidairiten
- Han Chahan
- Handcrafted by M.G.
- HandyGames
- Hanemine
- Hanerom
- Hangame
- Hangjiyun Hanhuazu
- Hangover Cat Purrroduction
- Hangulstory
- Hanimaru
- Hanimiao Hanhuazu
- Haniwa Immersion
- Hanjuku Nora
- Hank Worx
- Hanmaru
- hanmori
- Hannah Unkrich
- Hannuri
- Hanpamania-Soft
- Hanrangen
- Hanuli
- Haoh
- Haoh Darkness
- Hao Yu
- HappieS
- Happinet Games
- Happy Animal Friends
- Happy Backwards
- Happy Elements
- HappyEnd
- Happy Factory
- Happy Make Co., Ltd.
- Happymeal Inc.
- Happy Moe Love Time
- Happy West
- Haraiso Marionettes
- Haramase Project
- Harawari
- Harbinger_CR
- Harbor
- Hard
- Hard Co., Ltd.
- Hardcore001
- HARD HYPNO
- Hare Tokidoki Gratin
- Harinezumi Koubou
- Harmonia
- HarmoniaProxPro
- Harmorise
- HARNESS
- Harotobira
- Harrison Barton
- Harrison Hochkins
- haru
- Harukami
- Harukaze
- Haru-Kesu Games
- Harvest
- Harvster2.0
- Hasalynx Games
- Hase im Haus
- Hassaku
- Hatena
- Hato-King
- Hato no Sushiki Seisakusho
- Hatsuen Kikan
- Hatsune C
- Havidity Games
- Hawkeye Co., Ltd.
- Hayabusa Star
- Hayako Fansub
- Hayashigumi
- HazardKid
- Haze
- Haze
- Hazel-Bun
- Hazelnut
- Hazemuth Studios
- HAZUKASHII ♥ TEAM
- Hazuki Co., Ltd.
- HB&KINOME
- HBM Dev
- HBOX.JP
- HCGstudio
- H-do-C
- h.d.p.
- HeartBring
- Heart Bringan