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Nagiya Honpo

Nekotama

Nekoya

Nekoze Kaikan

NeverEverRemember

Newness

Nigred

Nijigen e no Katamichi Kippu

Nine Lives

Nurejiru

Ohgetsu

Omni-sha

One-up

Onee-chan Land

Onomatope*

Onomatope*Raspberry

Oppai Empire

Oppai Guild

Otemoto

Otto

Otusun Club

POISON MOTION

PUSH! Publication

Palette (old)

Peach Soft

Peony

PinballMap

Pink Question

Pinpai Juicy

Ponyori Legend

Project-μ

Purple software, Silver Co., Ltd.

RABBIT-GARDEN

RAM

RIFF*RAFF

Radi

Raster Kapsel

Rebecca

Ricotta

Rouseiya

RozenKreutz

RunningGirl

RusK

S Underground

SEACOXX

SILKY'S PLUS WASABI

SRO Software

Saboten

Saint

Saketoba Meshi