Koei Tecmo sues YOUZU for copyright infringement. Game music, images, and company names of "Nobunaga's Ambition" and "Taiko Ryushiden" are used without permission in web advertisements.

Koei Tecmo sues YOUZU for copyright infringement. Game music, images, and company names of "Nobunaga's Ambition" and "Taiko Ryushiden" are used without permission in web advertisements.
Koei Tecmo Games is a subsidiary of YOUZU (SINGAPORE) PTE. Ltd. announced that it has filed a lawsuit in the Tokyo District Court seeking an injunction against acts such as copyright infringement and compensation for damages arising from such acts....

The linked article is in Japanese.