Volunteer Work Exchange in Japan

[Sumire909]

Hello guys
I'm planning on travelling Japan while doing some volunteer help exchange (Workaway, Helpx). The work is mostly helping with cleaning the hostel/Guesthouse and is completely without salary. So in exchange for helping out I only get free accommodation.

I'm sure some of you have heard of it before, therefore I wanted to ask you about the visa needed for such volunteer work? I have a hunch that visa waiver/tourist visa would be enough since It's not payed work, but I'd like to be absolutely sure before I plan my trip any further.

I would also like to hear about your workaway/helpx/wwoofing experiences!

Thank you~