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- Hanrin no Yume
- Hantang Guoji
- Hanuli
- Haocheng Yang
- Haoh Darkness
- Haou
- Hao Yu
- Hapcyon
- HappieS
- Happinet Games
- Happy Animal Friends
- Happy Backwards
- HappyCapyCoffee
- HappyDaedalus
- Happy Elements
- HappyEnd
- Happy Factory
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- Happy Make Co., Ltd.
- Happymeal Inc.
- Happy Moe Love Time
- HappySadPotato
- HAPPY TALK
- Happy*Wednesday31
- Happy West
- HAQ
- Haraiso Marionettes
- Haramase Project
- Harapeko
- Harawari
- Harbinger_CR
- Harbor
- harbourr
- HARD
- Hard Co., Ltd.
- Hardcore001
- Hardcorn
- Hardended
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- HardyTales
- Hare Ichi
- Hare Tokidoki Gratin
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- HARNESS
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- haru
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- HARUKANARU-JIKUU
- HARUKAZE
- Haru-Kesu Games
- haruki Translation
- Harune Rima
- Haru no Sakura
- Harusaki Xueyuan Tonghaohui
- Harvster2.0
- Hasalynx Games
- Hase im Haus
- Hashibiroko
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- Hassaku
- Hasumi natsume
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- Hatena
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- Hatim Benhsain
- Hatoge
- Hatogoro TIMES
- Hato-King
- Hato no Sushiki Seisakusho
- Hatsuen Kikan
- Hatsune C
- Hatsune Hanhua Zu
- HatsuYume
- Hattoritei
- Hau ring
- Hautecouture Inc.
- Havidity Games
- Hawkeye Co., Ltd.
- HawkZombie
- Hayabusa Star
- Hayafuji Yuuru
- Hayai Jikan
- Hayaimochi
- Hayako Fansub
- Hayama Misaki
- Hayashigumi
- Hayivka
- Hayuki
- HazardKid
- Haze
- Haze
- Hazel-Bun
- Hazelnut
- HAZUKASHII ♥ TEAM
- Hazuki Co., Ltd.
- Hazy mist Studio
- HB&KINOME
- HBM Dev
- HBOX.JP
- HCGstudio
- hcnone
- H-DaLi
- H-do-C
- h.d.p.
- HEADLOCK
- HeadLocker
- Head Roll Studios
- HEADROOM
- Healer Main
- HeartBring
- Heart Bringan
- Heart Color
- HeartCoreDev
- HEARTDREAMERS
- Heart Electronics Industry Co., Ltd.
- Heartmoor Studios
- Heartomics
- heartpunch
- Hearts
- Heart's nest
- Heart Soft
- Heartsoulstudios
- Heartstrings Interactive
- Heartsworn Games
- HeartSync Productions
- HEART WORK
- Heart Works Records
- Hearty Robin