Welcome Yeoh-san! (Feel free to tell me if you'd like another name to call you)
As I mentioned in the email, I'll plan a small meetup during your stay. According to my schedule, only afternoon of June 23 is available. Then I'll collect other participants (about 1-4 people) and find a venue. Currently the best candidate is
https://tatami-works.com/, which you might like its traditional-Japanese style. And AFAIK it's relatively vacant even in holidays. It costs
2,000 yen per day per participant.
If you have any requests about the venue, time and the contents of the meetup, don't hesitate!