Japanese translation?
Lights!
その道に明るい（そのみちに あかるい）
＝You know well about (respective) matters.
If you practicing Japanese conversation, writing or you often translate news articles, you should know formal expressions and trend – colloquial. I recommend Globe.Asahi. Here is a concrete example with the expression “Cultural Appropriation”. Let’s try!
WebWavelife with Namiko Sakamoto
Život na webu s vlnkou Namiko Sakamoto