70s mod vintage Japan drip glaze ceramic coffee cups & mug tree set

Mod 70s vintage ceramic mugs set with small metal mug rack, made in Japan. I love the brown drip glaze here, and the red, blue, green, and gold. (Fire, water, earth and sunny sky?)

There's six mugs as shown, all 4" tall. The mugs and the mug tree are all in good, gently used condition. A great retro set for a small kitchen, I think!