Also known as: ドコモダケ
The anthropomorphic mushroom mascot for the Japanese mobile phone operator NTT DOCOMO. Docomo-dake (ドコモ茸) reads as the name of a mushroom, but it is also a pun meaning "only Docomo."
Wikipedia Page (Japanese only): https://ja.wikipedia.org/wiki/%E3%83%89%E3%82%B3%E3%83%A2%E3%83%80%E3%82%B1