"Kumaji" is about wars and family ties.
"Kumaji" is a name of her grandmother's younger brother. He used to be a pilot and died in WWⅡ. He left her family a pile of letters. Miyuki took them over from his father. She uses old craft paper which used to belong to a calligraphy artist and copies the sentences from the letters using Chinese ink, trying to express family ties and love that were beautiful but ephemeral.