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What's New. (Only available in Japanese.)
- 2024.12.20
- HIROTA News Letter Vol.46 is released.
- 2024.11.25
- HIROTA News Letter Vol.45 is released.
- 2024.10.28
- HIROTA News Letter Vol.44 is released.
- 2024.08.26
- HIROTA News Letter Vol.43 is released.
- 2024.08.01
- Notice of summer holidays in 2024.
- 2024.06.25
- HIROTA News Letter Vol.42 is released.
- 2024.05.27
- HIROTA News Letter Vol.41 is released.
- 2024.04.25
- HIROTA News Letter Vol.40 is released.
- 2024.04.24
- Notice of long holidays in May, 2024.
- 2024.03.25
- HIROTA News Letter Vol.39 is released.
- 2024.02.27
- HIROTA News Letter Vol.38 is released.
- 2024.01.26
- HIROTA News Letter Vol.37 is released.
- 2023.12.27
- HIROTA News Letter Vol.36 is released.
- 2023.11.27
- HIROTA News Letter Vol.35 is released.
- 2023.10.24
- HIROTA News Letter Vol.34 is released.
- 2023.09.25
- HIROTA News Letter Vol.33 is released.
- 2023.08.24
- HIROTA News Letter Vol.32 is released.
- 2023.08.01
- Notice of summer holidays in 2023.
- 2023.07.24
- HIROTA News Letter Vol.31 is released.