Sumiko Watanabe - Profile embed 1
| July 2016 | Studied kaleidoscope making at Koji Yamami Kaleidoscope Art School |
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| 2018 | Participated in the "Koji Yamami and Friends Exhibition" (participates annually thereafter) |
| 2024 | Participated in KALEIDOSCOPE EXPO 2024 in Arizona, USA |
| 2025 | Rainbow Kaleidoscope Contest at Sendai Kaleidoscope Museum Parlor Division - Grand Prize "Rainbow" |
