You’re otterly welcome!
FYI, there is an aquarium where you can shake hands with otters.source
The otter touching experience runs from 11:50 on weekdays and 12:40 on the weekend and public holidays, but the park recommends that you make an appointment or they can’t guarantee you’ll get to feel the otters. Attending costs only 500 yen (US$5).
It’s located in Keikyu Aburatsubo Marine Park,Japan, here is the website: aburatsubo.co.jp?