Those Ithaca-SKB 100s were nice simple knockabout guns. The earlier ones with straight grip were called Royal Light and later ones with 3" chambers pg, beavertail wood were little heaver and would make very good inexpensive target guns. Japanese may not have tradition of game shooting, but they sure are good thinkers. Last gun I examined was Sk/SK 26" B.C. Miroku O/U from ca 1960s. It had nicely engraved receiver, nice checkering on walnut stock, disk set strikers and wonderful vented recoil pad with piece of thin leather glued to pad so it would not hang on clothing while the gun was mounted. Another well though out feature was extra hole drilled in solder at muzzle end of barrels. This is smart as it avoids dead space between barrels and therefore makes oxidation less likely. One does not see this type of thinking put into guns from other makers.