I bought a really cheap set of insulated screwdrivers many years ago, they looked cheap and nasty but the one driver i have left is the one I use most for electrical /computer stuff with the jis type screws, I keep it and get annoyed if it goes out of sight but it is great for undoing tight jap type screws, I have had a magnifying glass on it and it definitely is jis it's tip is still perfect after years of use. BTW I have sets of snap on drivers that will not work on some stuff but this always seems to and to me is worth much more that the £10 snapon drivers that I have, even though it only actually cost 50-75p !
