It sounds like a sweet match: a cabin in the Adirondack mountains and a japanese
soaking tub...
According to the client, the bathroom will have a traditional Japanese washing station and the tub will be free standing with water able to spill over all 4 sides.
We first made a quotation for this project about 6 months before and were pleased to be contacted again, as the sitework is progressing and reaching its final stages..

Hinoki wood tub AB grade (quartersawn) / L shaped corners
Dimensions are: L1400mm x W750mm x H640mm (ext. dim.) 550mm (deep) .
The bottom of the tub is finished with natural oil and the joints are realized with wooden dowels.
Accessories include an internal removable seat and traditional wood cover.

The corner joint is made in such a way that the water cannot reach the head of the planks (cut perpendicular to the wood veins) which is more vulnerable to water.

And here is the detail of the cover planks.