I've managed to scrounge up forty rounds for my Arisaka over the years but most places now don't carry them anymore.
"Gad Custom Cartridges
" claims to have 7.7 Jap.
I have no idea if they are good to deal with or not.
"I think myself that we have more machinery of government than is necessary, too many parasites living on the labor of the industrious."
Thomas Jefferson- Letter to William Ludlow, September 6, 1824