Inquiries and Feedback

As a precaution to prevent the spread of the novel corona virus at our company, for the time being, telephone inquiries shall be accepted at our Customer Service Center between the hours of 10:00 a.m. and 3:00 p.m. during the week (excludes Saturdays, Sundays, and national and company holidays).

Inquiries may be sent to us at any time via the inquiry form at the bottom of this page. Please allow a couple of business days for a response.

We do apologize for any inconvenience and thank you for your understanding.

For product-related consultations and inquiries, please contact us by telephone.

Ryukakusan Customer Service Center

Phone: +81-3-3866-1326

Hours: 10:00 a.m. to 5:00 p.m. (Except Saturdays, Sundays, and national holidays)

  • We ask that you provide us with your telephone number so that we can call you back if any problems are experienced with the call. To remove the caller ID block, dial 186 before entering the telephone number.

  • Phone calls are recorded to enable us to understand the content of inquiries more accurately. Thank you for your understanding.

  • Please note that we do not accept health consultations.

  • Please make sure that you dial the correct number.

For non-product-related inquiries or feedback, please use the inquiry form below.

Precautions regarding Inquiries

  • The content of our reply to customers is intended for the individual customer only. We do not permit reproduction or secondary use of part or all of the content.

  • Emails shall be read during business hours. Emails received on Saturdays, Sundays, national holidays, our founding anniversary, summer holidays, or new year holidays shall be attended to as soon as possible after the holiday.

  • Hours: 10:00 a.m. to 5:00 p.m. (Except Saturdays, Sundays, and national holidays)

  • It may take some time to reply to inquiries, depending on the nature of the inquiry or the volume of inquiries received at that time. Please understand that we may not be able to provide a response to every inquiry.

  • We may contact you via telephone or postal mail to answer your inquiry instead of email, depending on the nature of the inquiry.

  • Personal information and the content of individual consultations shall be handled carefully and shall not be disclosed to a third party. For more information, please read our privacy policy.

  • If the email address you have provided is incorrect or if we experience system failure, we may not be able to provide a response to your inquiry. If you do not receive a reply, please contact us by telephone.

  • Please note that we may not be able to reply to your inquiry if the information you have provided is incomplete.

  • We are unable to respond to matters regarding advertisements and various services, etc. or requests for sponsorship.

Inquiry Form

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Details of inquiry

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