[3] He gained popularity with his radical video style, but he was also known for his caring personality for his junior YouTubers, who called him "Oyakata".

[4] In January 2021, Watanabe allegedly solicited nude photos from an underage fan, which subsequently caused his agency Uuum to drop him as an act and YouTube to permanently ban his channel.

[9] In 2015, Watanabe made his acting debut in the Squash Films' drama titled Dancing Office Worker.

[11] After getting arrested on suspicion of battery in the same month, his activities were cancelled for the remainder of the year, including a new label contract between with Avex and an appearance of Kaiware Hummer at A-Nation 2019, while he remained at Uuum to do clerical work.

[13] On January 22, 2021, Uuum announced that Watanabe had been dismissed from the agency after confirming he solicited nude photos from an underage girl.

Following Watanabe's 2021 arrest, Imaizumi announced in July 2021 that she would not be registering their marriage and that she would be raising the child herself with support from her family.

[21] On July 18, 2019, UUUM later stated that Watanabe's activities would be suspended, including Kaiware Hummer's appearance at A-nation 2019.