also: テマ
noun
theme; topic; subject matter; motif; project; slogan
Broadly used for a central topic, subject, or motif in conversation, art, music, events, or projects. Can also refer to a slogan or campaign theme.
from German Thema
会議のテーマは環境問題です。
The theme of the meeting is environmental issues.
この曲のテーマは愛と平和だ。
The motif of this song is love and peace.
文化祭のテーマは「未来への架け橋」に決まった。
The slogan for the school festival was decided as 'A Bridge to the Future'.