So, here's my review of the Rokutaro Nakade A2 from 1962.
It's a very light guitar, probably around 1,2 kg or so, but it doesn't feel fragile at all. It's well built with solid spruce top and solid Indian rosewood back and sides. I'm not sure if the fingerboard is ebony. The top has many lacquer cracks, but nothing trough the woods as far as I can tell. The action is low at 3.2/2.8 mm and the neck is straight, with a little relief. The scale length is 650/51 mm and the neck shape is slim, pretty comfortable actually. Sound wise it's quite responsive and transparent due to the light construction and the separation is great. Kind of "airy". The basses are very nice and the trebles sweet and bright, sustain above 12th is actually ok. A charming sound really, but not modern at all. I replaced the tuners with custom made Rubners, since the original ones were quite ugly and didn't function very well. The frets are like new, probably replaced recently. All in all I'm pleasantly surprised and it's certainly one of the most interesting guitars I've played from this era. This also confirms what I already knew: Many Japanese classical guitars from the 60s has, in lack of better words, soul...
All the best from Sweden