Rein in Japanese

Rein is written ライン in katakana. Katakana is the script Japanese people use for foreign names, so this is how Rein would appear on a Japanese ID card, a café cup or a name tag. Depending on the origin of the name, it can also be written レイン (as written in Japan) and リーン (spelled out).

Our top pick is 良音 (Rain). 良 means “goodness” and 音 means “sound”. Other good options are 楽音 (Rain) and 良生 (Rai).

Partly. The characters 良音 appear in Japanese names, but with the reading Ikuto and Rion rather than Rain. As a spelling of Rein, it is a creative kanji choice (ateji): Japanese readers will see the meaning of each character.

良音 has 16 strokes in total (良: 7, 音: 9). It takes some practice to write neatly, so look up the stroke order before trying it with a brush.

Each character in 良音 has a positive meaning, so it is a reasonable choice. Keep in mind that Japanese people will read it as the meaning of the characters, not instantly as “Rein”. If you want your name to be recognized, katakana (ライン) is clearer. Either way, ask a native speaker to check the final design.