Origin: Finnish, Japanese
美香 (Japanese) “beautiful fragrance”
美加 (Japanese) “beautiful increase”
Meaning: a masculine Finnish name, a short form of Mikael, from Michael meaning “who is like God?”
Mika is also a Japanese feminine name meaning “beautiful fragrance/increase” from Japanese mi 美 (beautiful) combined with ka 香 (fragrance) or ka 加 (increase). There may be other meanings depending on different kanji but these were the two I found.