Mayumi Cox is a practitioner with more than 20 years of experience as an HR and organization development leader at global companies including Morgan Stanley, Nomura Securities, Richemont, and Royal Canin, where she designed and implemented people systems herself. Building on that experience, she provides consulting that translates executive decisions into execution through people and organization.

Beyond HR system design, talent development, and leadership development, she has led initiatives that enabled HR to engage directly with business and executive agendas, evolving its role and increasing its value. She did not advise from the outside; as an HR leader she made decisions and implemented them on the ground, and that is the foundation of her consulting today.

As CEO of Team Next LLC, she now partners with clients across retail, publishing, advertising, pharmaceuticals, and other industries to drive people and organizational transformation. Rather than delivering a standard framework and leaving, as a large firm might, she personally accompanies executive teams, creating the conditions in which decisions and actions move forward through dialogue and structure. Engaging beyond titles and hierarchy, she connects the perspectives of executives, HR, and frontline teams to articulate the organization's desired future and its next step.

Her strength is tailoring globally developed expertise to Japanese organizational culture and on-the-ground realities. She connects executive intent with frontline reality and translates strategy into action. She is particularly effective where differences in perception or underlying assumptions have stalled decision-making, clarifying them and moving teams toward alignment and concrete action.

She is also committed to articulating and systematizing her experience to expand the value and potential of the HR profession, partnering with leaders to consider how HR can move from running people processes to taking part in business and strategic decisions, and to act as a trusted business partner alongside executives.

• When you want to raise the quality and speed of decision-making
• When leadership and the front line are misaligned
• When systems and initiatives are not translating into results
• When you want to adapt global standards to the Japanese organization
• When you want to rethink executive-team roles and collaboration

• She builds mechanisms that actually work, not slideware
• The principal partners directly with the executive team
• She stays until results take hold, not just recommendations
• She optimizes global expertise for the realities of Japanese organizations

• HR strategy and organizational transformation
• Performance management and reward / evaluation design
• Leadership and organization development (OD)
• Talent management and succession planning
• Culture transformation and employee engagement

• Improved transparency and speed of decision-making through evaluation redesign and calibration
• Established consistent promotion frameworks, clarifying decision criteria and talent development
• Redesigned executive-team roles and collaboration to strengthen execution and performance
• Improved hiring quality and retention through structured (STAR-based) interviewing
• Built cultures of trust and ownership by designing dialogue that elevates relationships, thinking, and action

• Team Next LLC — CEO (2022–Present)
• Griffith Foods — APAC Talent & Organization Development Director
• Royal Canin Japon — People & Organization Director
• Richemont Japan — Senior Manager, HR Business Partner / L&D Manager
• Nomura Securities — Vice President, Leadership & Development
• Morgan Stanley — Director, Talent Management

Outside of work, she enjoys swimming, scuba diving, hot springs, and travel. Born in Okayama in 1976, she studied in the UK from the age of 15, later worked in Australia, and is now based in Tokyo.