Customer support & contact

Customer support

Watch Care Instructions

Items to Prepare:
Please have a soft cloth ready to avoid scratching the stainless steel. A microfiber cloth is recommended.

Case, Crown, and Metal Bracelet:
Before starting, check the entire watch and remove any dust or particles that may cause scratches.
Use a clean soft cloth or clean microfiber cloth to wipe off any dirt or grime from the case, crown, and metal bracelet. When cleaning the crown, wipe it without pulling it out from the case. If you don't frequently adjust the crown, it is recommended to rotate it a few times to prevent rust.
Note: If you are particularly concerned about dirt on the metal bracelet, you can prepare a spring bar tool and remove the metal bracelet from the case to wash it with soapy water.

Handling of Magnetic Fields

I.TARU watches are automatic mechanical watches that are not resistant to magnetic fields. Please keep them away from strong magnetic devices such as refrigerators and induction cookers. Also, avoid placing them near magnets, such as in women's handbags. When using them near common electrical devices like smartphones, maintain a distance of at least 5cm.

For more detailed information on magnetism, please visit the website of the Japan Watch Association (Japan Clock & Watch Association).

Periodical maintenance / overhaul

By having the watch disassembled and cleaned every 3 to 5 years from the date of purchase, you can continue to use it for a long time.

ISHIDA C&T OFFICE serves as your contact point for OEM manufacturers or affiliated repair companies. Please refrain from contacting OEM manufacturers directly and rely on us for any requests.

Please note that a handling fee of 525 yen (including tax) per overhaul will be charged.

For inquiries, please contact us using the inquiry form below.


Please contact us using the inquiry form below. After receiving your inquiry, we will provide you with the specific address for sending your watch for repair.

ISHIDA C&T OFFICE serves as the contact point for OEM manufacturer Kowa Seiko Corporation or affiliated repair companies. We kindly request that you refrain from contacting the OEM manufacturer directly and rely on us for any requests.

Please note that a handling fee of 525 yen (including tax) will be charged per repair.

Once you submit your inquiry through the inquiry form, we will provide you with instructions for the repair process within 1 business day.

Office Hours:
Weekdays: 10:00 AM to 6:00 PM Japan Time (excluding Saturdays, Sundays, and Japanese holidays)


Please complete following information, so that we get back to you as soon as possible.

If you wish to contact customer support, please use contact form below.


  • "NAME" : Please fill in your full name including surname, middle name, first name.
  • "Phone number": Please fill in your full phone number without country code.
  • "Comment": Kindly type such as "SERVICE", "MARKETING", "REPAIR", "PERIODICAL MAINTENANCE/OVERALL", "OTHERS" on top of your comment to clarify your inquiry.

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