Notice of Temporary Closure Due to In-House Training

Dear Sir/Madam,
We hope this letter finds you in good health and spirits.
We sincerely appreciate your continued patronage and support.

We regret to inform you that due to employee training, we will be temporarily closed during the following period:

【Closure Period】 Wednesday, October 8, 2025 to Friday, October 10, 2025

During the closure period, we will continue to accept inquiries via email. However, responses will be provided sequentially starting Tuesday, October 14, 2025.

We apologize for any inconvenience this may cause and appreciate your understanding.

Katsura Opt Systems Co., Ltd.