Akihabara Moe Characters Contest

From Mascots.moe Wiki

The Akihabara Moe Characters Contest (Japanese: 「アキバで見かけた萌えキャラコンテスト」, literally "Contest of the Moe Characters seen in Akihabara") is a yearly popularity contest held by Akiba PC Hotline!, in which people can vote for moe characters representing or personifying various PC shops, hardware and software (notably OS-tans) that were featured in Akihabara.

Tsukumo-tan, the mascot of the Tsukumo shop from 2009 to 2020, won the first popularity contest, as well as the ten next ones in a row, before her retirement due to licensing reasons. Since then, Suisho Shizuku won all the editions so far.