Where does “津輕” come from?

津輕 (Chinese) comes from Japanese 津軽, from Japanese 軽, from Japanese 軽自動車, from Japanese 自動車, from Japanese 自動, from Japanese 自動詞, from Japanese 詞, from Middle Chinese 詞.

Ancestry of “津輕”, step by step

Step	Language	Word	Meaning
1	Japanese	津軽	a placename, such as that of
2	Japanese	軽	Abbreviation of 軽自動車; light, easy; lightweight
3	Japanese	軽自動車	a light vehicle, kei car, city car, specifically a four-wheeled passenger vehicle with engine displacement less than 660 cubic centimeters
4	Japanese	自動車	automobile, car, motorcar
5	Japanese	自動	automatic movement, automatic functioning;...
6	Japanese	自動詞	intransitive verb
7	Japanese	詞	word; word; part of speech
8	Middle Chinese	詞	—

Every word from Middle Chinese 詞 →Every word from Japanese 自動 →Every word from Japanese 自動詞 →