Possible Clues:

• Straw floor mat
• Farewell note that Japanese put on the floor
• Mat at a judo dojo
• Japanese runner covers up part of Hiroshima tattoo
• Tea ceremony mat
• Mat made from rice stalks used as a floor-covering in Japanese houses
• Mat used for judo
• I'm off, then I'm back for oriental furnishing
• Rush mat commonly used as a floor covering in Japan
• Japanese runner reflected in Hiroshima tattoo