noun
Refers to the current season in contexts such as sports, fashion, TV, or weather.
今シーズンの新作コートが店頭に並んだ。
This season's new coats are now in stores.
今シーズンは雨が多かった。
We had a lot of rain this season.
今期 is more formal and often used in business or accounting contexts for 'this term/quarter', while 今シーズン is common in sports, fashion, and entertainment.
Compound of 今 (this) and シーズン (season), a straightforward modern borrowing from English 'season'.