NA は下記のアルバムに収録されています

	アルバム	アーティスト
	Train to Okinawa	尺八 : 皇保
The melody of "Train to Okinawa" uses a five-note scale commonly heard in traditional Okinawan music. The islands of Okinawa once formed an independent country with its own culture, including language, music and dance. It is impossible to return to those times, just as it is impossible to catch a train to Okinawa, even a train as slow as this one.