Many Japanese players seem to think Sada`s nylons are better than Kazuo`s while Kazuo`s steels are better than Sadao`s.subjective I reckon, I do know Sada wrote a tiny kanji on the bottom left hand corner on some of his washi labels.one for heaven one for earth.evidently one means the wood was chosen for it`s tone the other means the wood was selected for it`s beauty. I can`t say for sure he had a hand in every Sada guitar made.he was called both Sadao and Sada.so not sure if his signature means he built the guitar or not, I have no idea how big his operation was at it`s peak, maybe he was a one man show, maybe not. Some have English on them.I`m guessing exports.others are all in Japanese.

That Sadao label pictured above is but one of the 6 or 8 I`ve seen so far, some of mine have the light blue label while others have the hand written washi paper labels. I do own several Sadao nylon string guitars.fabulous, so far I have 7 and there isn`t a stinker in the lot, some appear higher end than others but as far as I can tell they`re all solid wood. I don`t own any Kazuo guitars, see em in the local Rock Inn but they`re new and I can get a whole fleet of used Sadas for the price on one new Kazuo. Recently read Sadao went bankrupt and left Japan to save face, first to Korea then China.can`t confirm that but it may be why Kazuo doesn`t speak of his relative.at least we`re sure they were related.somehow. 2.it`s in Japanese and I haven`t asked my wife to translate all of it so maybe the answers are in there but I gotta think, if they were, some one would have written about it on line already so my guess is.he hasn`t spilled the beans yet. What I`ve read is this.and I can`t say it`s 100% certain.the original Sadao left the Suzuki violin company in Fukushima prefecture in 1935 to start off on his own and went to Nagoya, he taught both Kazuo and Sadao guitar building, Kazuos says in the book he went to America to study luthery from `61 to `65.I`ve read Kazuo and Sadao were brothers and/or cousins, even read one was the uncle to the other, nobody seems to know for sure.except Kazuo and it`s a story he isn`t keen on, theres an extended interview with him in the Japan Vintage series of books on acoustics, vol. Yairi eh.a topic that even Japanese authors who write books on MIJ acoustics can`t seem to solve though lots has been written about them, evidently Kazuo isn`t talkin` and I`ve read Sadao has passed so.

S yairi guitar specifications explained