About Coach Sumiko
Accredited ADHD Coach
I'm Sumiko Stacey, an ICF ACC accredited ADHD coach based in South East England, providing personalised ADHD coaching online throughout the UK and internationally in English and Japanese.
My work is centred around one word: capacity.
I help adults understand their ADHD brain, recognise what affects their ability to think and act, and build the capacity to navigate life with greater clarity and intention.
My own experience of trying to work harder to overcome perceived weaknesses eventually led me to understand ADHD differently: not as something to fix, but as a way of functioning that needs the right understanding and support.
That experience shaped the way I coach today: curious rather than judgemental, practical rather than prescriptive, and focused on helping each person discover what genuinely works for them.
My Professional Training
ICF (International Coaching Federation) Accredited Coach, ACC
Certified ADHD Life Coach (International ADHD Coach Training Center)
Neuroscience of Coaching Practitioner
Professional ADHD Coach, ACO (ADHD Coaches Organization)
Positive Intelligence® Coach
Mental Health First Aid & Advocating Mental Health in the Workplace
Certified Organisational Specialist™️
Qualified Yoga Instructor
Fascia Release
Tunbridge Wells Business Awards Finalist in the Health & Wellbeing Sector, 2025
This recognition fuels my commitment to ensure no one has to navigate ADHD challenge alone or in silence.
"Sumiko skilfully help you see ADHD challenges in more useful brighter light. Carefully and gently she somehow guide you on the path towards solutions you held yourself but didn't know. I would highly recommend her to anyone with ADHD/life overwhelm."
Testimonial
Mai
About Coach Sumiko
Coach Sumiko is the professional ADHD coaching practice of Sumiko Stacey, an ICF Associate Certified Coach (ACC) and ADHD coach based in South East England, UK.
She provides personalised ADHD coaching for adults online throughout the UK and internationally, in English and Japanese. In-person ADHD coaching is available in Tunbridge Wells, Tonbridge, Sevenoaks, London and surrounding areas, subject to availability.
Her coaching focuses on understanding ADHD, executive functioning, emotional regulation, practical strategies and building capacity to navigate everyday life with greater clarity and intention.
She also provides Access to Work ADHD coaching and runs a weekly online fascia release membership.
I take a compassionate, practical and exploratory approach, helping you develop self-awareness and strategies that can be adapted to your real life rather than following a one-size-fits-all system.
If you’ve spent your whole life feeling “not enough”, pushing harder, yet still feeling behind & out of control... You're not broken.
Your brain just hasn't been supported in the way it works best.
No more endless self blame.
No more quick fixes that fade.
Ready to create your systems that optimise how your brain functions best?
"As a parent of 2 young adults with ADHD, I often brought issues to coaching where I was struggling to work out the best way forward. Sometimes the issues were just my own challenges.
Sumiko always showed me great compassions and understanding and combined this with gentle but skilled expertise in coaching. It was so helpful to have her support to help me explore my own situations and identify my own solutions."
Testimonial
Patricia Delaney,
Social Worker