Me again…I looked at some stuff and noticed the current Kobun (plain edge-don’t have the serrated) in AUS8 is hollow ground as well as the Master Tanto in San Mai. (Someone has mentioned the MT already, my mistake I overlooked but can confirm)
The Kobun is priced so well that one could buy several and if need be, ‘ditch’ it or abuse it, and not suffer too much. That said I don’t know how much longer they will be available to replace. I’ve also seen a gentleman online that uses them as throwers and they hold up.
There are probably more examples. You’ve got me interested in digging! Hope these help. Salute.