I have no Sega Master System so I have no use for this game, anyone have one? would like to know what's inside this cart.

I've got one and am willing to give it a shot if nobody local to you can check.

Loosely translated, this is what the text says on the end label. I'm surprised nobody picked up on that.   



Edit: Also, there's a SLIGHT possiblility of that being a re-seal

LoL, this type of stuff was almost always sealed by the individual stores, not the manufacturers, with very few exceptions.

There were C64 games on cassettes too. I never had any of those, or the carts though, all of my games were floppy disk games.

This is a SEGA-1000 compatible game cartridge made by AAronix (阿羅士), a Taiwanese electronic company back to 1980's.
As Tim mentioned, this is a girl's golf game cloned form the game cartridge made by another SEGA SG-1000 clone console maker Tsukuda.
This game is originally released by Taukuda for it's SEGA SG-1000 clone console "Othello Multivision" with the title and number as" OM-G006 岡本綾子のマッチプレイゴルフ".
Then AAronix cloned this game to its "blue cartridge" listed as "B-021 女子高爾夫" (the title "B" means blue cartridge).
I have some of the AAronix collections and happy to share here:
https://flic.kr/p/EFj19U...

Now that’s a quality first post.