noun, na-adjective, noun which may take the genitive case particle 'no'
straightforward honesty; single-minded honesty
Describes a person or attitude that is uncompromisingly honest, often to the point of being naive or inflexible. Can be used as a noun, na-adjective, or no-adjective.
He has a straightforwardly honest personality and cannot tell a lie.
A life of single-minded honesty can sometimes be disadvantageous.
正直 means 'honest' in a general sense, while 正直一途 emphasizes an unwavering, almost stubborn dedication to honesty.
一途 alone means 'single-minded' or 'earnest', but 正直一途 specifically applies that intensity to honesty.
Compound of 正直 (honesty) and 一途 (single-minded, earnest). The exact historical derivation is uncertain, but the combination straightforwardly conveys 'single-minded honesty'.