This is the replacement blade for the Gyokucho Fugaku Kataba Super Hard (No. 112), the 240 mm folding kataba in the Fugaku line.
It has the same specs as the blade on the saw: a stiffer 0.6 mm backless blade with crosscut teeth at a 1.9 mm pitch (13.4 TPI), for deep cuts in hardwood, sheet goods and thicker timber. When the teeth dull, fit a new blade and keep your beech handle.
Gyokucho saws are made in Miki, Hyogo, by Razorsaw Kogyo, which was set up in 1969 when it developed the replaceable-blade saw. Gyokucho Sangyo, its sales company since 1975, sells them.