The roof was shingled by a talented local roofer to save on cost and time. Western-style wooden (Western red cedar) shingles are thicker and larger than Japanese-style cedar shingles, so the look is not as subtle as a traditional Japanese shingled roof.
After the shingling, exterior wall sheathing was added.
Then Sakaguchi-san troweled a basecoat plaster over the sheathing.
When this was completed, he returned to his shop to cut out redwood siding for the lower portion of the exterior wall. The owners attached the siding themselves.