I'm sorry to have to rain on your parade, but goodness, what an awful mess this is. I've been watching these go across various Japanese auction sites for the past couple of years, and I snagged a couple of them to look at not long back. They are a not-very-good reproduction (of unknown and dubious origin -- marketed but not made in Japan!) of the old 880-series H2 fog and driving lamp lens-reflector, hacked to accept an H4 bulb. This may barely meet the oldest and laxest of the obsolete Japanese headlamp requirements for very old cars, but probably not; it certainly does not meet any current Japanese, European, or US standard and the light emitted by this hacked mismatch of lens/reflector and bulb cannot properly be called a beam pattern.
These are really intended for show cars that aren't actually driven on real roads after dark.
Also, the rights to "SEV Marchal" still belong to Valeo except in the United States where they were bought a few years back by Candlepower (the bulb sellers, not this board). I don't know what the name-rights situation is in Japan, but it is probably not as the "story on the revival" author seems to think it is; witness his or her ignorant and totally false claim that "The signature characteristic of these expensive lamps are the center cat face printed on the lamp, causing a cat eyes and cat ears silhouette to appear in your light's beam." There was never any cat silhouette in the beam! This is completely made up by someone who obviously does not know at all what he or she is talking about, and the rest of his or her guesses and assumptions look similarly wrong. The photo in the article, purporting to show the cat shadow, is even more of a ridiculous stretch than those "I saw Jesus in my french toast this morning!" types of stories, and even though photos of beam patterns are useless, you (or at least I) can see the utterly useless blotchy spray of light these lamps are producing.
I'm afraid the lamps you've found aren't anything like what you think they are. And even if they were, they would still be for the other (left) side of the road. It's not clear to me why you are looking to buy headlamps from Japan for a vehicle to be used in the USA; all Japanese-spec headlamps are for use on the left side of the road.