This is a 2-car N gauge set of the Alpico Kotsu Kamikochi Line 20100 series. I purchased it on an auction site and have never opened it. These are vehicles that began operation in 2022. They were introduced as replacements for the 3000 series, which had been in operation until then, by modifying the Tobu Railway 20000 series. N gauge models of the 20100 series are rare items.