| Name | Type | Country | Number |
|---|---|---|---|
| H2T | Editor | France | 1 |
| Hachette | Editor | France | 1 |
| Hachette Book Group (HBG) | Editor | United States | 6 |
| Hakusensha白泉社 | Editor | Japan | 22 |
| Hana to Yume花とゆめ | Magazine | Japan | 12 |
| Hana to Yume Comics花とゆめCOMICS | Imprint | Japan | 11 |
| Hana to Yume COMICS Special花とゆめCOMICSスペシャル | Imprint | Japan | 2 |
| Hana to Yume ONLINE花とゆめONLINE | Website publishing | Japan | 1 |
| Hartaハルタ | Magazine | Japan | 13 |
| head-trick.com | Website publishing | France | 1 |
| Heroes Comicsヒーローズコミックス | Imprint | Japan | 1 |
| Hifumi Shobō一二三書房 | Editor | Japan | 1 |
| Hōbunsha芳文社 | Editor | Japan | 46 |
| Holp Shuppanほるぷ出版 | Editor | Japan | 2 |
| Horror M (Mystery)ホラー M (ミステリー) | Magazine | Japan | 1 |
| Hot-manga | Editor | France | 9 |