The logo of 3Hz inc. used in credits
The original uploader was <a href="https://en.wikipedia.org/wiki/User:Joseon_Empire" class="extiw" title="wikipedia:User:Joseon Empire">Joseon Empire</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons. Original source: <a rel="nofollow" class="external free" href="http://3hz.co.jp">http://3hz.co.jp</a>