I was looking for a piece of jewellery that I could wear and fondly remember my time spent in Japan and I quickly settled on getting a diamond stud ear ring. Initially I had thought this would be a pretty simple purchase (being such a simple design in my eyes) but it turns out that it's either near impossible to find a jeweller that's willing to sell you a single stud vs. a pair, or the diamond that is used in the piece is small, overpriced, low quality and usually "palmed off" to unsuspecting tourists hearing of the Jewellery district for the first time. However fortunately for me I then stumbled upon Mark Hiroshi Willis and didn't hesitate to get in touch with him through LINE, receiving a near instant response. Mark was able to source an excellent quality 1.11ct LG Diamond at my request and fix this into a beautiful 4-prong platinum setting for me, with the piece being in my hands after merely a week and complete with all the relevant certification, documentation, guarantees and wonderful presentation. Utterly phenomenal turnaround. Pricing was extremely reasonable and I hugely appreciated his "No BS" approach to the whole order. He was extremely friendly and there was never any pressure, deceit, or otherwise pushy sales tactics. In short then, communication was excellent throughout and essentially instant through LINE/SMS should you have any questions before, during or after just as I did. It was great to be able to speak in English too! It's abundantly clear that Mark has an eye for quality pieces and truly loves his work which is fantastic to see. For temporary visitors to Japan, I will mention that there isn't a tax-free option with Mark. This really wasn't a deal-breaker in my eyes because the price was already excellent even when factoring in the included tax, but it should still be noted to set expectations. In summary, from start-to-finish Mark was an absolute pleasure to deal with and I genuinely would not recommend anyone else in future. Thank you, Mark.

The diamonds are top-notch, but they are also well made and can be worn with confidence (*^^*) The designs are amazing, ranging from simple ones to original and wonderful designs (lol)

Mark was an excellent coach to my partner and I through the purchasing process. He has been able to help us to find rings that match our personality and the quality is fantastic. I have already referred him to multiple friends and would be happy to continue to do so. If you’ve found yourself reading this review, you’re probably already considering working with Mark and I hope you make the choice to do so.

After visiting so many bridal shops feeling unsure, we decided to contact Mark. After our first consultation with Mark for an engagement ring, we came out of that meeting already so confident that we were making the right choice working with him. He gave us so much advice, information, and suggestions that assured me that I was making the right choices for my ring. He considered everything from lifestyle, to diamond colour, cut, design, and was very considerate about our budget when he was choosing diamonds for us and there was never any pressure throughout the process. The ring came out so, so, so beautiful! Highly, highly recommend Mark if you are looking for your next special piece!

I bought it as a present for my wife. I would like to give this product a 6 star for its high quality products and Mark's courteous customer service. I bought it at an event in Ginza, but it seems that events are held regularly across the country, so I would like to meet in person and purchase it again.

Mark has been my exclusive source of diamonds for my wife’s jewelry for well over a decade here in Japan - for engagement, gifts and anniversaries, etc. I cannot imagine someone more expert in his craft, here or anywhere else - while also being just a genuinely lovely human being. Most recently, he made us an eternity-style band - but with top quality larger-stones individually selected to match, that he custom set into a platinum 台座 of his own creation - and all this was at a far cheaper cost than anything remotely equivalent in the brand diamond stores. His afterservice (polishing, upgrades, resizing, repairs) too is phenomenal. If it’s diamond related, we can’t recommend Mark enough - especially 日本で。

I was looking for a gift for a friend. Mark helped me pick out the perfect piece. Great quality, great price

I purchased a pair of diamond earrings when they were on display at an event at Matsuya Ginza. I thought diamond jewelry would be a bit difficult to get into, but the owner was so courteous that I was able to shop at ease and at ease. I would like to visit you again.

Mark was brilliant and helped design the perfect ring for my fiance and did a beautiful job. I couldn't recommend a better service for this special occasion. Thanks so much, we are both delighted

I had a wonderful experience with Mark, who designed and prepared the engagement ring for my proposal. Mark was extremely knowledgeable and creative with his explanations, enabling me to select the perfect quality and style of diamond and ring for my vision and budget. He also worked with me to fine-tune the details thereafter to ensure that the ring was exactly as I wanted. Mark's level of personal service and guidance throughout the process was critical and I would highly recommend him.

Very kind and courteous! Above all, Mark’s diamonds are exceptionally beautiful. Timeless design!

You created a ring that I was very satisfied with. The creation was created based on a shared image based on a photo of the ring from an official store, and not only did they use detailed techniques, but they also took great care to accommodate resizing, so it will be a treasured timepiece for a long time. thank you very much.

I am truly glad that Mark took care of me at this crossroads in my life, and that this purchase was a good one. The design that my fiancée requested was completed with great care and detail, and we were very satisfied with the ring.

The designer has a deep knowledge of the jewelry design and will suggest something that fits your image. I also appreciate the detailed after-sales service.