SELECT opponent FROM table_name_43 WHERE location = "tokyo , japan" AND method = "decision (unanimous)" AND record = "4-1"
Apa itu lawan, ketika lokasi adalah "Tokyo, Jepang", ketika metode adalah "keputusan (bulat)", dan ketika catatan "4-1"?
CREATE TABLE table_name_43 (opponent VARCHAR, record VARCHAR, location VARCHAR, method VARCHAR)