Data & AI Advisor | Salesforce Architect
Converting data into value.
I'm Takeshi Hiratsuka, a Data & AI Advisor and Salesforce Architect in Tokyo. I help organizations turn data and AI strategy into action, designing unified architectures across Data 360, Tableau Next, Slack, and Snowflake — and share what I learn on stages from Dreamforce to TDX and in writing, in English and Japanese. Off stage I coach beginners, helped pioneer the Datablazer community in Japan, and work to bridge the Japanese and global data communities.
~20
talks per year
300+
beginners coached
EN + JP
writing & speaking
Speaking
~20 talks per year · JP + globalDecks are shared publicly on Speaker Deck after most talks.
Leading the Tableau Next frontier with JTUG and KTUG.
I lead and speak in the Tableau New Era / Tableau NOW! series, a recurring community forum for exploring where BI goes next as Tableau Next, AI agents, and semantic data models move from frontier concepts into practice. JTUG is the Japan Tableau User Group, and KTUG is the Kansai Tableau User Group.
Community & credentials
build · teach · bridgeData 360 AI Lab
An independent, practitioner-led community for building the trusted data foundations that let AI agents work in the real world.
View project →Build & lead
I helped pioneer the Datablazer Community in Japan, and I continue to lead the Tableau NOW! / Tableau New Era community event series with JTUG (Japan Tableau User Group) and KTUG (Kansai Tableau User Group): a public forum for challenging the Tableau Next frontier together.
I stay active in SFUG, JTUG, and architect meetups in Tokyo.
Teach & coach
I've coached 300+ beginners hands-on, and earned DATA Saber, the Tableau community certification.
After most talks I share the decks publicly on Speaker Deck, so the material keeps working for people who weren't in the room.
Bridge & translate
I work to connect the Japanese Datablazer community with the global Tableau DataFam — translating not just language, but architecture patterns and community culture between Japan and the world.
I publish in both English and Japanese.
- DATA SABER Tableau community certification
- DATABLAZER Salesforce Data Cloud community leader
- SNOWFLAKE SQUAD 2025 cohort
- TABLEAU NOW! Lead and featured speaker, JTUG & KTUG BI×AI series
- TABLEAU NEW ERA Series lead exploring Tableau Next, AI, and the future of BI
- JTUG Speaker, Japan Tableau User Group annual meeting
- SFUG CUP 2025 National finalist, Tokyo
- TABLEAU.COM Official customer story feature
Writing & media
EN + JP · sharing in public10 Use Cases of Data Cloud
Official Salesforce Japan guide on practical Data Cloud adoption, published under my editorial supervision.
salesforce.com → Column · ITmediaITmedia author page
Articles on data platforms and making organizations that can truly use AI and IT (in Japanese).
itmedia.co.jp → Blog · EnglishMedium — @marreta27
Conference reports and analytics deep dives in English, including Tableau Conference coverage.
medium.com → Featured slide deck · 2026Project Vanilla Core
Mita | Claude for Business lightning talk on redesigning business systems for the AI era with Claude Code.
View deck → SlidesSpeaker Deck
Public decks: SFUG CUP finals, semantic-layer architecture, Data Cloud × Tableau sessions.
speakerdeck.com → Blog · Japanesenote — marreta27
Essays and hands-on notes for the Japanese Salesforce and Tableau communities.
note.com → CompanyLeave a Nest Knowledge
Salesforce consulting partner in Tokyo. Salesforce Japan Partner Award 2025 (Slack category).
k.lne.st →Featured story
tableau.com · official customer storyTableau Next × Slack
Leave a Nest turns data into a profit multiplier
Our Tableau Next and Slack implementation at Leave a Nest is published as an official Tableau customer story. With Tableau Semantics, ten years of mature, highly customized Salesforce data became AI-friendly — so 150 employees can ask questions and act on trusted insights without ever leaving Slack.
Read the story on tableau.com →per data lookup,
org-wide in Slack
About
Born in 1980, I started in core systems development and data platform engineering. After leading business-systems adoption at SmartNews, I joined Leave a Nest Knowledge — the group's Salesforce consulting arm — in October 2023, where I serve as a board member.
My specialty is unified data architecture on Salesforce Data 360 (Data Cloud), Tableau Next, Slack, and Snowflake: the three-layer path from data lake to data model to semantics, designed so that both people and AI agents can act on trusted data. My personal mission is to grow organizations that can truly use AI and IT — not just install them. I try to give back to the community that raised me by learning in public and coaching the next generation of data beginners.
Off the clock: studying art history through Kyoto University of the Arts' correspondence program, visiting museums on business trips, and reading seinen and science-fiction manga.