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• [2026/04/06] Grand Sumo App [ver 2.4.22]release
• [2026/03/25] 03/26 Notice of Maintenance
• [2026/03/25] Grand Sumo App [ver 2.4.21]release
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• [2025/03/13] Grand Sumo App [ver 2.0.8]release
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• [2025/02/19] Grand Sumo App [ver 2.0.5]release
• [2025/02/12] Grand Sumo App [ver 2.0.4]release
• [2025/01/22] Grand Sumo App [ver 2.0.3]release
• [2024/10/01] 10/13～10/14、10/21～10/22 Maintenance of "Information (Help) and Inquiries"

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