Japanese professional printing company. Prominent among the doujin (fanwork) scene as it provides dedicated printing and binding services for doujinshi authors. Often credited in the higher-budgeted doujinshi fanzines as the printer of the work.
The company's logo is a stylized smiling sun (which rotates in animated versions). This logo will usually appear in the colophon (i.e. publication info imprint) section on the credits page at the end of a doujin comic.