Meet Our Team

MARIKO MITSUI

三井まりこ

Founding Broker

(425) 765 – 8742   MarikoMitsui@RellaAssociates.com
For more than 16 years, highly respected real estate broker Mariko Mitsui has combined her successful real estate wealth of knowledge in resale and new construction along with her compassionate dedication to her clients and friends, in creating a customized, full service detailed approach. Whether buying or selling a home is your need, Mariko Mitsui listens to all her client’s needs and excels in giving her full dedicated hands on support to even the smallest or simplest questions and strategize a plan for each situation.

Mariko Mitsui has earned a superior reputation for her full-service real estate business which also include relocation services, rental management, and real estate asset management, and consulting. It’s no surprise that due to her detailed marketing strategies, staging expertise, and her skilled negotiation power to represent her clients that she has brought her clients so much success.

When clients choose Mariko Mitsui, they are getting a strong negotiator, a thorough communicator who prioritizes her client’s needs above all else, and educates and works with them every step of the process. Mariko Mitsui is a Certified Residential Specialist (CRS). Mariko Mitsui’s passion outside work include being an avid soccer fan. She can be found cheering on the Seattle Sounders and at her two boys’ at their soccer games and practices.

MARIKO MARIE OSTERBERG

オスタバーグ・真理子・マリー

Broker + Executive of Marketing

(206) 697 – 1004   MarikoMarie@RellaAssociates.com
Raised in the greater Seattle area, Mariko Osterberg has always had a passion for helping others whether it was through volunteering, working with kids, and working with animals. Growing up she loved going house searching with her parents and has worked with them on various home construction projects over the years.

After majoring in Visual Journalism from Western Washington University, Mariko relocated to Japan to improve her Japanese language skills for a few years and returned to Seattle to start her profession in real estate.

Mariko takes pride in offering high-caliber full-service residential real estate expertise and is well known to all her friends and clients for her down-to-earth personality. She’s also a hard worker who brings to the team a wealth of knowledge in social media marketing and technology and is always focused on being a go-to resource and delivering the best possible results to all of her clients before, during and after a transaction.

TOMOKA HEROD

ヘロッド・ともか

Transaction Coordinator + Executive Assistant


While the rest of our team is helping you receive the best full customer service, showing you homes, and discussing strategies and sharing tips with you, you’ll find Tomoka working vigorously behind the scenes to coordinate vendors, and assisting in decluttering and selling your surplus furniture. Once you are into a contract or your offer has been accepted, the transaction is far from over. From here Tomoka will assist in communicating with you to monitor inspections, appraisals, title, escrow and loan processes and ensure a unified and smooth escrow process all the way to closing. Tomoka grew up in Japan and has one beautiful daughter. In her free time, she loves to travel, go hiking, and eat delicious food.

BRANDON CHRISTENSEN

ブランドン・クリステンセン

Mortgage Banker, NMLS: 950106

“Both Mariko Osterberg and Mariko Mitsui are consummate professionals in the real estate space. I’ve had the pleasure of partnering with them on several transactions and I can attest to their attention to detail, knowledge, communication and genuine care for their clients. Navigating a real estate transaction is never an easy task but working with their team sure makes it seem easy and seamless. They are very experienced and equipped to handle any type of transaction but it’s really their passion for the profession that makes collaborating with them to create homeownership opportunities so exciting!”

GINA BROWN

ジーナ・ブラウン

Senior Loan Officer, NMLS 115337

“Mariko and I have been working together for over 10 years. She and I have a great working relationship because we both have the same work ethic. Mariko has always put her clients first and has helped many families achieve the dream of home ownership. She is an excellent communicator and an excellent negotiator. Now that Mariko Marie has joined the team, they are both a force to be reckoned with! No stone will be left unturned to help you buy or sell your home. The team partnership they have developed is excellent! I look forward to the future and to be part of their team!”