Japanese names entering Chinese keep their kanji and are read in Mandarin (kanji-as-Chinese, not phonetic). 户田 'Toda' = 户田 in Chinese. Famous bearers: actress 户田惠梨香 (Code Blue, Death Note) and figure skater Toda Daisuke.
usage
If you say 户田 in Japanese-influenced contexts, listeners assume Japanese person/place; if you say it as ordinary Mandarin words it parses as 'household + field' - but no major Chinese place uses this combination.
