If you "dig into" the info linked to the "kanji" you can even find video of many of them being cut (though much of it is in Japanese or even Korean.) These two cultures have a much larger array of "splicing joints" and applications for them than we probably find anywhere else in the world.

They (and I) even carve them in stone for the base of post where they form both the post bottom and the plinth as one unit. Her is a link to some examples:

https://www.pinterest.com/tosatomo/stone-joints/

Feel free to email or call...the project sounds exciting.

Regards,

j