How should I write my name with an American first name and Japanese last name?


I generally understand that proper Japanese uses Hiragana and Katakana is for
slang/foreign words. Given that, my first name is super American but my last
name is Japanese. Would I then make my first name Katakana and last name
Hiragana?

(I haven't touched Kanji yet, so let's just stick to those two for now!)




Foreigners's names are usually written in katakana, even when their names are
based in Japanese.

For example, Michio Kaku is a Japanese-American with a full Japanese name, and
yet his name is usually written in katakana.  
[https://ja.wikipedia.org/wiki/ミチオ・カク](https://ja.wikipedia.org/wiki/%E3%83%9F%E3%83%81%E3%82%AA%E3%83%BB%E3%82%AB%E3%82%AF)

Other examples:  
[https://ja.wikipedia.org/wiki/日系アメリカ人の一覧](https://ja.wikipedia.org/wiki/%E6%97%A5%E7%B3%BB%E3%82%A2%E3%83%A1%E3%83%AA%E3%82%AB%E4%BA%BA%E3%81%AE%E4%B8%80%E8%A6%A7)

But if you are living or wants to live in Japan you can adopt a 通称名, a name to
be used inside Japan.  
Then you can adopt a name in kanji, if you want to. You can for example change
Higa to the original kanji name.

