About Core Group One

Big Brains, Small Machine.


Locally owned and operated in Honolulu, Hawaii, Core Group One, Inc. was established in July 2005 by Emi Anamizu and Jim Horiuchi to acquire Ogilvy & Mather Hawaii, Inc. Wanting to divest itself of the advertising business in Hawaii, WPP Group (the London-based parent company of Ogilvy & Mather) offered Emi and Jim the opportunity to purchase the company. Emi was the CEO and Jim was Creative Director at Ogilvy & Mather before the transition. Core Group One opened its doors on September 1, 2005. In January 2013, Hendrix Miyasaki Shin joined Core Group One, bringing together best practices in branding strategy, creative services, account management, new/social and traditional media and marketing.

Core Group One’s affiliated companies include CGO Digital (Core Group One’s in-house video editing facility), CGO Green (a sustainable ideas company), CGO Talent Group (Core Group One’s consortium of design partners, copywriters, account managers, public relations consultants, video directors, technology geeks and other contractors) and CGO Investments (a holding company for real estate investment).


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Emi Anamizu – Chief Executive Officer

Emi worked in San Francisco and Los Angeles before moving back to Hawaii for positions with Martin & Associates Advertising and Ogilvy & Mather Hawaii. She has over 25 years of business and strategic marketing experience. She has Master’s degrees from the USC Annenberg School of Communication and USC Leonard Davis School of Gerontology.
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Jim Horiuchi – President

Jim has over 30 years of marketing experience as Writer, Creative Director, Account Director and Director of Strategy at advertising agencies from coast to coast: McCann-Erickson and InterCommunications in Los Angeles and McCaffrey and McCall in New York, as well as Peck Sims Mueller in Honolulu.
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Jeff Hendrix – Vice President

Jeff provides clients 25 years of marketing and advertising experience, having served on both the client and agency side. He is known for his warmth, integrity and wizardly way of bringing together marketing partners. He was previously with Peck Sims Mueller and a partner with HMS Advertising. Jeff was named Ad Man of the year in 2001.

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Grant Miyasaki – Creative Director

Grant can be counted on for developing ideas that are innovative and out-of-the-box, yet is finely targeted. The result is advertising that is striking, memorable and relevant. He was previously with Ogilvy & Mather Hawaii, Peck Sims Mueller and a partner with HMS Advertising. Grant has received numerous awards and honors, including Ad Man of the Year in 2006.


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Leah Shigemura

Navigating through the data-driven digital world requires a unique set of talents. Leah is an innovative thinker who brings financial discipline, IT experience and innate creativity to our digital marketing initiatives. Leah has a masters in accounting from the University of Hawaii at Manoa and worked at a large public accounting firm prior to joining Core Group One. She plays tennis to hone her speed and agility.


Core Group One, Inc.

Phone: (808) 440-9421
Email: emi.anamizu@coregroupone.com