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December/2025 Exhibited at the 11th "+" Eye Exhibition
- October/2025 Exhibited at the Japan Watercolor Federation Members Exhibition and the Elite Selection Exhibition
- October/2025 Exhibited at the 92th Dokuritsu Exhibition
- October/2025 Traveled to South Africa for reporting
- August/2025 Exhibited at the Yamanashi Exhibition of the Women Artists Association
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July/2025 Katsuko Sakai Watercolor Exhibition (Solo Exhibition) at Ginza Gallichène
- June/2025 Submitted to the 78th Women Artist Association Exhibition
- May/2025 Japan Watercolor Federation Touring Exhibition Osaka Municipal Museum of Art
- April/2025 Japan Watercolor Federation Touring Exhibition Aichi Prefectural Museum of Art Gallery
- April/2025 Traveled to Portugal for reporting
- April/2025 Submitted to the 84th Japan Watercolor Federation Exhibition
- March/2025 Exhibited at the Dokuritsu Exhibition Spring New Artist Selection Exhibition
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March/2025 Small Works Exhibition (gallery project) at Ginza Galerie Chaine
- December/2024 Travel to Egypt
- October/2024 Exhibited at the 91th Dokuritsu Exhibition
