How do you say “four seasons” in Japanese?
四季（しき）shiki
日本（にほん）には、四季（しき）があります。
Japan has four seasons.
You can pronouns each season like below.
春（はる）spring, 夏（なつ）summer, 秋（あき）autumn, 冬（ふゆ）winter.
and also collect them 春夏秋冬, which is pronounce 春夏秋冬（しゅんかしゅうとう/shunkashuutoo）.