Haruka MizunariChief Marketing Officer

Haruka Mizunari · Chief Marketing Officer · Japan

The remit grew from explaining a service to leading its market account

Apr 2022 — Present

Chief marketing officer

Mizuhane Energy

Sector
Commercial-rooftop solar and related customer services
Ownership
Founder-controlled private business; minority growth investor since 2021
Company scale
JPY24.8 billion revenue in the year ending March 2026
Employees
680 employees in the year ending March 2026
Geography
Tokyo headquarters, serving commercial and industrial premises in Japan
Reporting to
Chief executive Kenji Sorihama
Team
Twenty-seven employees through four direct reports; nine agency personnel separately
Financial scope
JPY1.15 billion marketing authority for the year ending March 2027; project capital, contract pricing and technical sign-off excluded

Mandate

Make customer operating patterns, partner understanding and service responsibilities part of the energy proposition before expectations harden.

Outcomes

  • Replaced a single annual illustration with three hypothetical daily-use patterns in a selected education exercise.
  • Completed learning reviews with nine of twelve regional partners, with two deferrals and one withdrawal.
  • Clarified the alert recipient in eleven of eighteen selected handover accounts.
  • Revised nine and withdrew five campaign examples after examining weekend closure.

Decisions in context

I became CMO after five years leading commercial experience. The broader role combines the proposition, partner education and customer orientation under one marketing account. I report to Kenji Sorihama, with twenty-seven employees through four direct reports and nine agency personnel separately. My JPY1.15 billion authority for the year ending March 2027 is distinct from Mizuhane's project investment and JPY24.8 billion company revenue for the preceding financial year. Emi Narusawa remains responsible for engineering assessment and delivery. The most consequential decisions in this period narrowed what a campaign could imply: annual generation did not settle a customer's financial result, partner participation did not prove sales, and a clearer welcome did not alter maintenance performance. I have presented these executive matters to the board without holding a director appointment. The ongoing educational workshops retain an open outcome, which is appropriate while the programme is unfinished and no renewal decision has been established.

Reason for the move

Current appointment; any additional contribution requires employer agreement, relationship review and a workable calendar.

Apr 2017 — Mar 2022

Director of commercial experience

Mizuhane Energy

Sector
Commercial solar propositions and customer-service development
Ownership
Founder-controlled private company; minority growth investment completed in 2021
Company scale
JPY16.9 billion revenue in the year ending March 2022
Employees
470 employees by March 2022
Geography
Tokyo-based business serving Japanese commercial premises
Reporting to
Chief marketing officer
Team
Twenty-one employees through four direct reports by March 2022
Financial scope
JPY620 million annual commercial-experience programme authority by March 2022; engineering capital and customer contract commitments excluded

Mandate

Connect the pre-selection explanation with the questions customers raised during the subsequent service relationship.

Outcomes

  • Reviewed twenty-two customer-orientation sequences with service colleagues.
  • Recast fourteen sequences where responsibility changed hands without a clear explanation; eight required no rewrite.
  • Introduced six joint reviews between commercial-experience and service teams during the final year.

Decisions in context

This appointment moved my attention from the initial customer discussion to the continuity of the relationship. The title described an executive functional role, not membership of the company board. I led twenty-one employees through four direct reports by March 2022 and held JPY620 million annual programme authority at that point. The company's growth investment in 2021 changed its ownership context, but I was not responsible for negotiating that transaction. My team's work examined where the explanation passed between functions. Fourteen of twenty-two selected orientation sequences needed a clearer account of that transition; eight remained as they were. The six joint reviews in the final year created a regular place to discuss unresolved questions with service colleagues. These were process changes, not evidence of improved generation or attributed revenue. The experience prepared me for CMO responsibility by showing how an early proposition can influence a much longer relationship whose delivery belongs to several functions.

Reason for the move

Promoted to CMO in April 2022 with responsibility for the wider marketing programme.

Apr 2011 — Mar 2017

Head of customer development

Mizuhane Energy

Sector
Commercial-rooftop solar installation and service
Ownership
Founder-owned private business established in 2008
Company scale
JPY6.2 billion revenue in the year ending March 2017
Employees
210 employees by March 2017
Geography
Tokyo headquarters and commercial customer relationships in Japan
Reporting to
Commercial director
Team
Twelve employees through three direct reports by March 2017
Financial scope
JPY180 million annual customer-development authority by March 2017; project design and capital approval excluded

Mandate

Develop a customer explanation that identifies operating questions without presenting a preliminary illustration as a site-specific answer.

Outcomes

  • Examined thirty selected early-stage customer questions with engineering colleagues.
  • Organised those questions into five discussion themes used in the introductory material.
  • Reworked ten partner briefing sessions around the distinction between an illustration and an assessed proposal.

Decisions in context

I joined Mizuhane after nineteen years in workplace-equipment services. Energy required me to learn a different proposition and recognise the limit of my earlier experience. I reported to the commercial director and built a twelve-person customer-development function through three direct reports by the end of the appointment. JPY180 million was the annual programme authority at that stage. Engineering colleagues helped us examine thirty selected questions and organise them into five themes for the introductory account. Ten partner briefings then explored how an illustration differed from an assessed proposal. My task was to make the customer discussion more useful, not to become the technical authority behind it. The move was a deliberate sector change: I brought experience of explaining an ongoing service while accepting that yield modelling, site assessment and installation required knowledge I did not possess. That combination of useful experience and explicit limits remained important in later roles.

Reason for the move

Moved into commercial-experience leadership in April 2017 as the company needed a more connected customer account.

Apr 2005 — Mar 2011

Head of customer programmes

Orisawa Services

Sector
Workplace-equipment support and service programmes
Ownership
Privately held Japanese service company
Company scale
JPY26.4 billion revenue in the year ending March 2011
Employees
1,100 employees by March 2011
Geography
Osaka headquarters with business-customer service operations in Japan
Reporting to
Director of customer operations
Team
Sixteen employees through three direct reports by March 2011
Financial scope
JPY240 million annual customer-programme authority by March 2011; service contracts and equipment capital outside the remit

Mandate

Translate recurring customer questions into programmes that explain service responsibilities beyond the original purchase contact.

Outcomes

  • Examined twenty selected workplace service-introduction packs.
  • Revised twelve packs to identify the operational contact more clearly; eight were retained.
  • Held four cross-functional programme reviews in the final year with customer operations.

Decisions in context

Customer-programme leadership gave me responsibility for the work that followed a research finding. I led sixteen employees through three direct reports by March 2011, with JPY240 million annual authority and a reporting line to the director of customer operations. The company figures describe Orisawa at the end of the period rather than the scale I personally controlled. A review of twenty introduction packs found twelve in which the operational contact needed a clearer place in the explanation. Eight did not need to change. I learned to value a programme that could leave useful material alone instead of treating universal revision as proof of activity. Four cross-functional reviews in the final year kept the work connected to the operating team. Moving into energy involved leaving a familiar sector, but it preserved the question that interested me: whether the person living with a service understood the relationship as clearly as the person who selected it.

Reason for the move

Joined Mizuhane Energy in April 2011 to apply service-communication experience in a different industry.

Apr 1999 — Mar 2005

Customer research manager

Orisawa Services

Sector
Workplace-equipment services and customer support
Ownership
Privately owned service business
Company scale
JPY11.2 billion revenue in the year ending March 2005
Employees
620 employees by March 2005
Geography
Osaka-led service relationships across Japanese business premises
Reporting to
Head of customer programmes
Team
Seven employees through two direct reports by March 2005
Financial scope
JPY60 million annual customer-research authority by March 2005; no ownership of service pricing or company revenue

Mandate

Give programme colleagues an evidence-based account of the questions customers encountered after selecting a workplace service.

Outcomes

  • Coordinated twenty-eight selected customer conversations in the final research cycle.
  • Documented seven recurring questions for programme review.
  • Prepared three internal research briefings that retained the limits of the selected sample.

Decisions in context

My first management appointment required a different discipline from writing the material myself. By March 2005, seven employees worked through two direct reports, with JPY60 million annual research authority. The team needed a clear account of the question being examined and the limits of the evidence gathered. Twenty-eight selected conversations in the final cycle produced seven recurring questions and three internal briefings. I did not describe those conversations as a representative account of every customer. The value lay in giving programme colleagues specific matters to examine, including where a service explanation was understood differently by the purchase contact and the operating recipient. I learned to separate a useful observation from a conclusion that required broader evidence. The promotion in April 2005 placed the resulting programme choices within my remit, making me responsible for deciding which findings warranted a change and how the work would be resourced.

Reason for the move

Promoted to head of customer programmes in April 2005, moving from research delivery to programme decisions.

Apr 1992 — Mar 1999

Service communication coordinator

Orisawa Services

Sector
Workplace-equipment service communication
Ownership
Private Japanese business
Company scale
JPY6.8 billion revenue in the year ending March 1999
Employees
360 employees by March 1999
Geography
Osaka regional customer-service team within the Japanese business
Reporting to
Regional service communication manager
Team
Individual contributor within a nine-person regional team; no direct reports
Financial scope
No delegated budget, pricing authority or profit responsibility

Mandate

Prepare clear service information from the arrangements supplied by the operating team and record questions that the material did not answer.

Outcomes

  • Helped revise eighteen regional service-information sheets during the final assignment cycle.
  • Recorded six recurring recipient questions for the research team.
  • Supported four briefings where operating colleagues explained the actual service arrangements.

Decisions in context

I entered Orisawa in April 1992 after completing my business degree the previous month. As an individual contributor in a nine-person regional team, I worked from the operating arrangements supplied by colleagues rather than deciding those arrangements myself. I prepared those explanations as one contributor, without authority over colleagues or expenditure. The work taught me that a well-written description could still reach the wrong person or leave an ordinary next step unclear. During the final assignment cycle, I helped revise eighteen information sheets, recorded six recurring questions and supported four operating briefings. These were contributions within a team, not enterprise-wide transformations. The experience made me attentive to the recipient of an explanation as well as its content. Moving into research management gave me a way to examine those questions more deliberately and learn which observations could support a programme decision beyond the immediate document.

Reason for the move

Appointed customer research manager in April 1999 after developing experience in service explanation and question gathering.

What I am looking for next

My next contribution would build on the relationship between a substantial customer decision and the operating life that follows it. I am not seeking to leave my present executive appointment. A defined advisory discussion or a carefully assessed first board role could be relevant where a business needs to examine adoption, partner understanding or the public explanation of a technical service. I would want to understand the proposed company's economics, ownership and actual responsibilities before discussing fit. My experience can help test whether a proposition prepares a useful customer conversation; it does not substitute for engineering judgement, investment appraisal or specialist regulatory knowledge. A continuing appointment would require employer consent, review of relevant relationships and a calendar that includes preparation rather than attendance alone. I would prefer a specific account of the contribution needed over a broad invitation to represent marketing. The question is whether my experience helps the organisation examine a material decision while leaving executive delivery and technical authority with the people responsible for them.