Refers to the title or heading of a document, book, chapter, or similar written work.
論文の題目を決めるのに時間がかかった。
It took time to decide on the title of the thesis.
Used for the main subject or theme of a discussion, presentation, or written work.
会議の題目は環境問題です。
The topic of the meeting is environmental issues.
Nichiren chant
Specifically refers to the chanting of 'Namu Myōhō Renge Kyō' in Nichiren Buddhism.
彼は毎朝、題目を唱えている。
He chants the Nichiren chant every morning.
題目 means the topic or theme of a work (e.g. a speech or essay), not the written lettering of a title, despite sharing the kanji 題 with 題字.
research subject; study topic; laboratory subject
Composed of 題 (topic, title) and 目 (item, heading). The Buddhist sense derives from the practice of chanting the title of the Lotus Sutra.