Loanword prefix used in compounds to express personal ownership or individual preference, such as マイカー (my car) or マイペース (one's own pace). Not used as a standalone possessive pronoun.
See also: マイホーム
He commutes in his own car.
He always brings his own pillow when he travels.
Please work at your own pace.
one's own way; my way
reusable cup; personal cup
one's own house; one's own home
reusable shopping bag; my bag
current personal obsession; personal fad
reusable personal bottle; water bottle; thermos
one's own bowling ball · team possession; control of the ball
one's own rule; personal rule
My Number; national identification number; personal identity number
Borrowed from English 'my', used as a prefix in Japanese compounds.