noun
this art; this field of study; this way
A literary, somewhat archaic noun used to refer to a particular art, discipline, or path of study, often in a self-referential or respectful manner. Rare in modern Japanese outside of classical or formal writing.
彼は斯道の大家として知られている。
He is known as a master of this art.
斯道に励む者は少なくなった。
Fewer people now devote themselves to this field of study.