noun, noun or participle which takes 'suru'
Rare, literary term for traveling without revealing one's identity. Not used in everyday conversation.
彼は間行で地方を巡ったという記録が残っている。
There is a record that he traveled the provinces incognito.
Also means traveling incognito, but often specifically for a person of high status (e.g., a monarch) going out in disguise.
Compound of 間 (kan, 'interval' or 'secret') and 行 (kō, 'travel'). The exact historical derivation is uncertain.