noun
railfan; trainspotter; railway enthusiast
Familiar, affectionate term for a railway enthusiast, especially one who enjoys trainspotting or photography. Often used among hobbyists.
彼は休みのたびに撮り鉄として鉄ちゃん活動をしている。
He goes out railfanning as a train-photography enthusiast every holiday.
あの駅にはいつも鉄ちゃんが集
Railfans are always gathering at that station.