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• [2026/02/13] Grand Sumo App [ver 2.4.15]release
• [2026/02/05] Grand Sumo App [ver 2.4.14]release
• [2026/01/30] Revision of the Grand Sumo App Terms of Use
• [2026/01/26] Grand Sumo App [ver 2.4.13]release
• [2026/01/14] Grand Sumo App [ver 2.4.12]release
• [2025/12/26] Grand Sumo App [ver 2.4.11]release

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Announcement

• [2025/03/13] Grand Sumo App [ver 2.0.8]release
• [2025/02/25] Grand Sumo App [ver 2.0.5]release
• [2025/02/12] Grand Sumo App [ver 2.0.4]release
• [2025/01/16] Grand Sumo App [ver 2.0.3]release
• [2024/12/09] Grand Sumo App [ver 2.0.2]release
• [2024/10/01] 10/13～10/14、10/21～10/22 Maintenance of "Information (Help) and Inquiries"

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