Free Appraisal.
We guarantee the highest possible price.
We are a franchise of Daikichi Purchase.
Through our network, we work with a large number of partner buyers affiliated with Daikichi, allowing us to offer highly competitive purchase prices.
Meet the Owner
Soichiro Yamamoto
Owner’s Message
As the owner, I believe trust is the foundation of every transaction. We specialize in sourcing and purchasing valuable Japanese items with integrity, professionalism, and global standards of service.
Our goal is to connect authentic Japanese quality with customers around the world through honest evaluations and dependable support.
About us
Your happiness is our success.
We are a specialty buyback store dedicated to discovering new value in your cherished items and passing them on to the next owner.
Our experienced appraisal team carefully evaluates a wide range of items, including luxury brands, jewelry, watches, and precious metals.
With a commitment to providing a service you can trust, we prioritize transparent pricing and honest communication. We strive to explain our appraisal process clearly, ensuring that even first-time customers feel confident and fully satisfied before proceeding with a transaction.
In addition to in-store services, we also offer home pickup and online appraisals, providing flexible options to suit your lifestyle.
We believe that every item holds a story and value beyond its price.
As a bridge connecting your treasured belongings to their next owner, we will continue to deliver reliable and professional services you can depend on.
English-Speaking Appraiser
Rika
Izawa
Appraiser
I specialize in evaluating jewelry and luxury brand items. My motto is that everyone should leave happy, and I am committed to offering prices that my customers can confidently accept.
Koki Kimoto
Apprasier
I am an appraiser specializing in precious metals and antiques. I value conversations with my customers and carry out each appraisal with great care, as if I am being entrusted with their precious memories.
Company
Company Name:
Sentinel Giken Co., Ltd.
Head Office:
5-13-16 Sumida, Sumida-ku
Tokyo 131-0031
Japan
Store Location:
2-17-7 Azusawa, Itabashi-ku
Tokyo 174-0051
Japan
Secondhand Dealer License:
License No. 307742518993
Issued by: Tokyo Metropolitan Public Safety Commission
Date of Issue: July 16, 2025
Representatives:
Tsuyako Yamamoto, Representative Director
Soichiro Yamamoto
Sentinel Technology Research Co., Ltd.
Location (Head Office):2-17-7 Azusawa, Itabashi City, Tokyo 174-0051, Japan