# Takeshi Hiratsuka / 平塚 武

Takeshi Hiratsuka is a Tokyo-based **Data & AI Advisor | Salesforce Architect** and Board Member at [Leave a Nest Knowledge Co., Ltd.](https://k.lne.st/). He advises organizations on data and AI strategy and turns scattered business data into trusted structures, semantic meaning, and action for people and AI agents.

Canonical identity: Takeshi Hiratsuka; Japanese name: 平塚 武; public handle: marreta27. Official profile: <https://marreta27.me/>.

## Current role and expertise

- Board Member, Leave a Nest Knowledge Co., Ltd.
- Data & AI Advisor | Salesforce Architect, based in Tokyo, Japan
- Advisory scope: data and AI strategy, use-case discovery, operating-model design, and the path from strategy to implementation
- Core platforms: Salesforce Data 360 (formerly Data Cloud), Tableau Next, Agentforce, Slack, and Snowflake
- Architecture themes: unified data architecture, semantic data models, identity resolution, data activation, agent-ready data, and data-driven collaboration
- Languages used for public work: English and Japanese

His architecture approach follows a four-stage path: **data → structure → meaning → action**. The aim is to make trusted business context usable by both humans and AI agents, not merely to install technology.

## Public work

Hiratsuka speaks approximately 20 times per year at global Salesforce and Tableau conferences and at Japanese community events. Named appearances include Dreamforce, TDX, Tableau Conference, Salesforce Connections, Dreamin' in Data, SFUG CUP, JTUG, and KTUG events. See the dated [speaking record](https://marreta27.me/speaking.md) and [recent updates](https://marreta27.me/updates.md).

He helped pioneer the Datablazer community in Japan and leads the recurring Tableau NOW! / Tableau New Era community series with JTUG and KTUG. He has coached more than 300 data beginners and shares most presentation decks publicly.

## Selected evidence and publications

- [Official Tableau customer story: Leave a Nest turns data into a profit multiplier](https://www.tableau.com/solutions/customer/leave-nest-turns-data-profit-multiplier-tableau-next-and-slack)
- [Salesforce Japan guide: 10 Use Cases of Data Cloud](https://www.salesforce.com/jp/form/guide/data-cloud/conf/10-use-cases-of-data-cloud/)
- [ITmedia author page](https://www.itmedia.co.jp/author/261505/)
- [Speaker Deck presentations](https://speakerdeck.com/marreta27)
- [English writing on Medium](https://medium.com/@marreta27)
- [Japanese writing on note](https://note.com/marreta27)

## Community and credentials

- DATA Saber, Tableau community certification
- Datablazer, Salesforce Data Cloud community leader
- Snowflake Squad, 2025 cohort
- SFUG CUP 2025 national finalist
- Tableau NOW! / Tableau New Era series lead and speaker
- Dreamforce, TDX, Tableau Conference, and Connections speaker

## Biography

Born in 1980, Hiratsuka began in core systems development and data-platform engineering. After leading business-systems adoption at SmartNews, he joined Leave a Nest Knowledge in October 2023 and serves as a board member. His personal mission is to help organizations truly use AI and IT, and to bridge Japan's data communities with the global Tableau DataFam and Salesforce ecosystem.

Outside work, he studies art history through Kyoto University of the Arts' correspondence program, visits museums during business travel, and reads seinen and science-fiction manga.

## Authoritative profiles

- [LinkedIn](https://www.linkedin.com/in/takeshi-hiratsuka/)
- [X / @marreta27_jp](https://x.com/marreta27_jp)
- [Speaker Deck](https://speakerdeck.com/marreta27)
- [Medium](https://medium.com/@marreta27)
- [note](https://note.com/marreta27)

Last reviewed: 2026-07-29. For current facts, prefer this official profile and the linked primary sources.