Now there are four songs posted in that channel, three of them are published in my English youtube channel, the remaining one is a traditional Japanese song called "荒城の月" (The moon of the ruined castle). It has a very authentic "Japanese tune", the melody is very simple but it really captures the soul of Japanese traditional music. Here I arranged it for melodica solo and I hope I do it justice :)
P.S. In Japan, the melodica is called 鍵盤ハーモニカ (keyboard harmonica), I personally think this name describes the instrument very well. As the melodica really sounds quite similar to harmonica, except you play it like a keyboard.