株式会社TimeTree
10 known investors
TimeTree is a shared calendar application that allows users to manage multiple calendars and coordinate schedules across groups like families, hobbies, and schools. The service offers a free tier with ads and a premium subscription adding features like file attachments and ad-free browsing.
Also known as JUBILEE WORKS · TimeTree · TimeTree, Inc. · 株式会社JUBILEE WORKS
Investors · 10
Also in the syndicate · 5
Company profile
researched Aug 2026株式会社TimeTree (TimeTree, Inc.) develops and operates TimeTree, a mobile and web calendar-sharing application that lets users create multiple calendars, invite others, and coordinate schedules for groups such as families, partners, workplaces, hobby circles and schools. Filters allow users to view personal, family and followed calendars together or switch between them. Beyond the core app, the company operates TimeTree 公開カレンダー (public calendars), through which organizations can publish event information in calendar form for users to follow, and has built additional lines including a paid subscription tier, an advertising business, a scheduling SaaS product (Tocaly), social gifting (TimeTreeギフト), and data-driven research output under the TimeTree未来総研 banner.
The company was founded on 1 September 2014 as 株式会社JUBILEE WORKS by Taito Fukagawa (CEO) and Chajin Park (CSO), both previously at Yahoo Japan and Kakao Japan; the TimeTree app launched on 24 March 2015 and was selected for Apple's App Store Best of 2015. Registered users passed 1 million in February 2016 and grew through 10 million (July 2018), 20 million (December 2019), 30 million (2021) and 40 million (2022); as of September 2025 the company reported more than 67 million users globally and over 13 billion registered schedule entries. The firm renamed itself 株式会社TimeTree on its fifth anniversary, 1 September 2019.
Headquarters are in Nishi-Shinjuku, Tokyo (Sumitomo Fudosan Shinjuku Central Park Tower, 18F), following a February 2025 relocation announcement with operations starting there on 24 March 2025. A Korean subsidiary, TimeTree Korea, Inc., was established in January 2025 in Seoul as the company's first overseas base.
Founding story
Co-founders Taito Fukagawa and Chajin Park, together with founding member Shunichi Matsuda, established 株式会社JUBILEE WORKS on 1 September 2014 under the credo of creating new everyday essentials; Fukagawa, Park and several other early members came from Yahoo Japan and Kakao Japan. The TimeTree app shipped on 24 March 2015. Initial press coverage was absent until a tweet by the CEO's wife about the launch spread widely, drawing media attention.
Business model
TimeTree monetizes a large consumer calendar user base through several channels: a free ad-supported app, the TimeTree Premium subscription (listed at USD 4.49 per month or USD 44.99 per year, with regional price variation), and B2B advertising and marketing solutions built on users' schedule data, including the TimeTree Ads platform, date-targeted advertising (TimeTree Ads ターゲットデイ) and the MIRAI_DSP ad delivery service. Adjacent offerings include public calendars for organizations, developer integrations (TimeTree API, TimeTree Plugin, TimeTree Connect), the Tocaly scheduling SaaS and TimeTree gifting.
Subscription revenue from TimeTree Premium plus advertising and marketing-solution revenue from corporate clients targeting users based on schedule data; the free tier is ad-supported.
Traction
Registered users grew from 1 million (February 2016) to 2 million (August 2016), 3 million (January 2017), 5 million (July 2017), 8 million (March 2018), 10 million (July 2018), 12 million (November 2018), 20 million (December 2019), 30 million (2021), 40 million (2022) and more than 67 million globally as of September 2025, with over 13 billion schedule entries registered. Cumulative funding reached JPY 6.7 billion by November 2025, and a post-money valuation including potential shares of JPY 23,604 million was reported as of 29 November 2025.
Latest developments
In September 2025 TimeTree announced a capital and business alliance with SK Telecom, Korea's largest telecom operator, with a JPY 2.2 billion investment from SKT, and on 5 November 2025 announced the final close of its series F round: about JPY 1.6 billion in new equity via third-party allotment plus roughly JPY 1.6 billion of secondary share transfers by existing shareholders, for about JPY 3.2 billion total and cumulative funding of JPY 6.7 billion. New investors were SK Telecom (lead) and Spotlight, alongside existing investors Atinum Investment, K2 Investment Partners and Mirae Asset Venture Investment. Proceeds are earmarked for AI-based feature development, marketing in Japan and Korea, and hiring. A CFO, Nobuhiro Takagi, joined in 2025 with responsibility for fundraising and management control. Subsequent announcements include a UI/UX renewal rolling out from 26 January 2026, certification as the official support app for Hiroshima Prefecture's shared housework and childcare project, an advisory appointment focused on "agentic advertising," and an official media partnership with MUSIC AWARDS JAPAN 2026.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
TimeTree reports more than 67 million registered users worldwide as of September 2025, having reached the milestone from a 2015 launch, and cumulative funding of JPY 6.7 billion across rounds through series F. It won the top prize (METI Minister's Award / JNB Chairman's Award) in the global category of the Nippon New Business Creation Awards in 2023.
The service is built around group-based calendar sharing and communication rather than single-user scheduling, allowing an unlimited number of shared calendars per user, and it converts the resulting schedule data into date-targeted advertising products and trend research — an asset that SK Telecom cited as the basis for joint AI development.
Technology
A cross-platform calendar-sharing service on mobile and web (a browser/tablet version launched in beta in May 2016), with feature layers such as Keep, Feed, memos, checklists, day counters, schedule scanning, and vertical calendar views. External integration is supported through the TimeTree API (schedule posting from 2019, schedule retrieval from January 2020), TimeTree Plugin, TimeTree Connect and voice assistant support for Google Home and Alexa. The company treats its accumulated schedule data — over 13 billion entries as of September 2025 — as the basis for advertising targeting and, following the SK Telecom tie-up, for AI-based feature development.
Go-to-market
Consumer growth has been driven by app-store distribution, word of mouth around the 2015 launch, and repeated television advertising campaigns (first TV commercial April 2017, national campaigns from April 2018 and November 2019). B2B revenue is sold directly via the TimeTree Ads platform, launched in beta in December 2017, commercially from July 2018 and formally released October 2019, with a dedicated marketing solutions division created in 2024. Media partnerships and data-based PR (e.g. MUSIC AWARDS JAPAN 2026 media partnership, TimeTree未来総研 trend reports, a joint year-end travel report with the NEWT travel app) also support marketing.
Consumers who need to coordinate plans with others — families, couples, work teams, hobby groups and schools — plus corporate advertisers and organizations that publish event information through public calendars.
Geography
Headquartered in Nishi-Shinjuku, Tokyo, with a Korean subsidiary, TimeTree Korea, Inc., in Yeoksam-dong, Seoul, established January 2025 as the first overseas base. Usage grew beyond Japan to South Korea, Taiwan and the United States from 2016 and later to Europe, particularly German-speaking markets; expansion in Korea and wider Asia is a stated priority.
History
Founded 2014 as JUBILEE WORKS; app launch and App Store Best of 2015 selection in 2015; 1 million users and web beta in 2016 alongside a JPY 210 million raise; 5 million users, first TV commercial and a JPY 530 million raise in 2017; 10 million and 12 million users, TimeTree Ads commercial launch, public calendars and roughly JPY 920 million in financing in 2018; renamed 株式会社TimeTree on 1 September 2019 with TimeTree API, Ads general release, 20 million users and about JPY 1.96 billion raised; app renewal and TimeTree Connect in 2020; 30 million users, the Tocaly scheduling SaaS and the Today feature in 2021; TimeTree Premium subscription and 40 million users in 2022; TimeTree gift business, schedule scan, chief officer structure, MIRAI_DSP and the Nippon New Business Creation Award in 2023; head office relocation, TimeTree Korea establishment, the SK Telecom capital and business alliance and the series F close in 2025.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Competitors · 5
by search overlap
Companies competing with 株式会社TimeTree for the same Google search keywords, organic and paid, via search-intersection analysis.
Timeline · 22
launches, deals, and filingsAdviser engaged to prepare for the "agentic advertising" era.
Final close comprising about JPY 1.6 billion of new equity via third-party allotment and about JPY 1.6 billion of secondary share transfers by existing shareholders; SK Telecom led, with Spotlight as a new investor and Atinum Investment, K2 Investment Partners and Mirae Asset Venture Investment participating.
Alliance with Korea's largest telecom operator including a JPY 2.2 billion investment from SKT, aimed at AI feature development and overseas expansion.
Moved to Sumitomo Fudosan Shinjuku Central Park Tower 18F, Nishi-Shinjuku, Tokyo, with operations starting 2025-03-24.
First overseas base, located in Yeoksam-dong, Seoul, to strengthen the business in Korea and other Asian markets.
Former KPMG AZSA audit manager, responsible for fundraising and management control as CFO and head of the corporate division.
Received the METI Minister's Award / JNB Chairman's Award in the global category.
First new product beyond the core app; a scheduling-coordination SaaS.
Name change on the company's fifth anniversary, accompanied by a full renewal of service and corporate sites.
Ad platform offered in beta from December 2017 began official sales in July 2018 and was formally released on 2019-10-01.
Company founded in Tokyo by co-founders Taito Fukagawa and Chajin Park, with Shunichi Matsuda as a founding member.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- 株式会社TimeTreetimetreeapp.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does 株式会社TimeTree do?
- Japanese developer of TimeTree, a shared calendar app for families and groups, with an ad platform built on schedule data.
- Who are 株式会社TimeTree's investors?
- 株式会社TimeTree's investors include Atinum Investment Co. Ltd., IMM Investment Japan, Kakao Ventures, Laguna Investment, Seibu Shinkin Capital.