Great adventures, thanks for sharing. I hitch-hiked thru Kyushu in the late 70's and met the best of people in the best of places, sharing delicious food and delightful conversation. There are few countries I'd hitch-hike thru today - except for Japan.
Video coverage of the event: https://youtu.be/CTZujeVYYL0 FYI: they have beer available inside! Also, talk to people in line to make sure you understand the missions (if you don't speak Japanese). In some missions, you have to stand still when the zombies attack. In others, you must seriously run.