Bahasa Jepangnya “masa kawin”

puncak musim; masa jaya; birahi; masa puncak

height (e.g. of summer); prime (of one's life); (being in) heat; peak (e.g. of cherry blossom season)

memasuki masa kawin; birahi

to rut; to go into heat

masa kawin sepanjang tahun

year-round mating season