This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 鍳 is uncertain. It appears to combine 金 (metal) with a component related to 監 or 覧, possibly as a variant or simplified form, but the origin is not well documented.
Since the meaning is unclear, focus on the shape: 金 (metal) sits at the bottom under a complex upper part that resembles 監 (oversee). Picture a metal mirror being inspected, but remember the meaning is uncertain.
For カン, imagine a can made of metal (金) being inspected: can -> カン, and the metal can is under the overseer's gaze.
Xin Jianzhen (ferry service between Japan and China)