These were my first stones when learning to use Japanese naturals. I would consider them all a great intro to toishi.
1: Aotogama, unsealed, soft (2 /2.5), 1620g
Picture 1 & 2
Dim: 22cm x 5.8cm x 5.7cm, $70
2: Oohira uchigumori, koppa , sealed, 1300g, medium hard(3/ 3.5), dim: 18.9cm x 13.2cm...