Welcome from newish member.

I look forward to learning about this "Japanese inspired swimming hole". So much so that I will have a hard time not researching the topic. I'll resist the best I can and give you the opportunity, as it arises, to educate us.

Right now, at 6" deep, it's more of a monster mud truck temptation, but yet a beautiful setting. I know how you feel, my place came with a very shallow 1/4 acre hole and it was all I could do to resist challenging the neighbor boy and his 4x4, but that would have ruined my friendship with his dad and I can imagine the work it would have created trying to get the boy's truck out of the 8 foot of silt that resided in the bottom.

All the best of luck, you'll find more advice here than you can digest.

Fish on!,
Noel