Three Plus Six LLC / est. 2023

Strategy for
the rest of us.

Strategy for the rest of us
Kawagoe, Saitama, Japan
Marketing Strategy / Relationship Design
01 — Positioning

Reexamining the gaps
from the structure up.

Three Plus Six LLC is a marketing strategy firm that addresses the structural gaps between advertisers and agencies, strategy and execution, brands and customers.

Drawing on 33 years of decision-making and frontline experience inside the advertising industry, we redesign the shape of strategy that businesses actually need -- from the outside looking in.

02 — Services

Four ways we walk
alongside strategy.

01
CARD Client-Agency Relationship Design

A specialized service that reexamines the relationship between advertisers and agencies -- selection, evaluation, and governance redesigned.

02
Strategy Sprint

An intensive engagement that structures business challenges and narrows the path to three strategic options.

03
Advisory Retainer

Ongoing strategic counsel at the leadership level -- monthly sessions, quarterly reviews, walking alongside you through decisions.

04
Open Platform Partnership

Deep, long-term co-creation with organizations in sports, regional development, and the social sector.

03 — Ecosystem

Three Plus Six Ecosystem

Three Plus Six is not only a company website. It is an ecosystem of connected surfaces: a place to read observations, a place to touch ideas as small prototypes, a place for publishing and dialogue, and a place where consultation and implementation begin.

01
Three Plus Six

The company, services, and consultation path. We reframe complex issues in advertising, brand, marketing, organization, and community work as structures that help value reach customers.

02
Intelligence

Weekly analysis of changes in markets, customers and brands, with implications for strategic decisions. Published in Japanese.

03
Biotope

A small knowledge habitat for strategy, marketing, behavioral science, and field notes. It is quietly pre-open, with observations and essays growing over time.

04
LAB

The experimental side of the ecosystem. LAB turns observations and hypotheses from Biotope into simulators, finders, and prototypes that can be touched and discussed.

05
note / LinkedIn

Publishing and dialogue. note is where longer thinking unfolds in Japanese; LinkedIn is where practical conversations and professional context connect back to Three Plus Six.

Weekly analysis comes from Intelligence.
Observations go to Biotope.
Experiments go to LAB.
Publishing and dialogue continue through note and LinkedIn.
Consultation and implementation return to Three Plus Six.

04 — Partnership

Long-term value,
rooted in community.

Three Plus Six LLC × COEDO KAWAGOE F.C. 2026 Season Official Marketing Partner
Current Work

Nurturing the relationship between region and brand.

Three Plus Six LLC serves as the Official Marketing Partner of COEDO KAWAGOE F.C., a football club based in Kawagoe, Saitama, with ambitions to reach Japan's J-League. We are involved in brand building, fan engagement, and the design of relationships with the local community.

Rather than one-off campaigns, we invest in relationships over time. This posture is the same one we bring to every corporate engagement.

05 — Voice

Writing is where
dialogue begins.

Founder Hiroaki Mori publishes regularly on note -- Japan's leading essay platform -- covering marketing, branding, organizational thinking, and first principles. Articles are in Japanese. Company announcements also appear here.

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Brand Statement

STRATEGY
FOR THE
REST OF US.

Strategy is not the exclusive property of large corporations.
We bring it to the people who need it most.

06 — About
Hiroaki Mori, Founder of Three Plus Six LLC
Founder Profile

Hiroaki Mori

Hakuhodo, TBWA\Chiat\Day Los Angeles, COO of TBWA\Hakuhodo\China in Guangzhou, CEO of McCann Erickson Tokyo -- then independence.

Hiroaki Mori

33 years on the inside. From here on, the outside.

Hiroaki Mori joined Hakuhodo in 1990, working across account management, marketing, brand consulting, and global project direction. After a posting at TBWA\Chiat\Day Los Angeles and serving as COO of TBWA\Hakuhodo\China in Guangzhou, he led McCann Erickson Tokyo as Representative Director and CEO for five years and nine months. He founded Three Plus Six LLC in June 2023.

Now based in Kawagoe, he draws on three decades of experience and networks to design, as an independent agent, the meaning, relationships, and strategy that businesses need to grow.

07 — Contact

Start by telling us
your story.

The initial consultation is complimentary. You do not need to have your situation fully mapped out. We will listen, help clarify the issues, and offer a candid recommendation on how we might be involved.

Send an inquiry Email us