Meet-ups Since 2007 • 18+ years JJUG has been fostering an environment where developers can grow together, learn from each other, and stay motivated through continuous interaction.
companies & levels Grow Together Beginners to experts, all contribute Innovate Diverse perspectives spark creativity Tech community gives you these opportunity Why Developer Communities Matter?
entry every April • Job hunting during 3rd or 4th year of university • Companies train new graduates from scratch • Job switching viewed as "career change" Low Labor Mobility • Long-term employment at same company is common • Many engineers have few job changes • Lifetime employment culture remains strong • Seniority-based system influence
learn about latest tech and best practices Information Gap Lack of access to global trends and best practices from overseas Limited Networking Few opportunities to build cross-industry professional networks Less Innovation Shortage of diverse talent makes it difficult to generate new ideas This is why the tech community matters more
Japan https://www.java-users.jp/ @JJUG Establishment: 2007/04 （TWJUG: 2006/07） Member: 13,640 (as of 2025/09/13) Activities Supporting Java communities in Japan Operating events such as conferences and meet-ups Exchange with the global Java communities
User Groupe Hokkaido (Java Do) Japan Java Women Group (Javajo) Okayama Java User Group Hiroshima Java User Group (inactive) Japan GlassFish User Group (inactive) JJUG support these communities • Send speakers • Cost support • Co-hosting events • etc…
conference Held in Tokyo (Offline) Twice a year (Spring, Fall) 8 tracks / 45+ sessions CfP Session + Sponsor Session + Unconference Attendees: 800 (recently) Japanese and English Free
(traditional-style inn) for 3 days Discuss with Java engineers from Japan and abroad Enjoy the hot spring Enjoy some activities Java Champions and experts from overseas also participated English only (no Japanese)
on the day No strict line between speakers and audience — anyone can talk or ask Some styles of Unconference Roundtable ←JOnsen Lightning talks Ignite Fishbowl Flexible and informal atmosphere
Twice a Year × Monthly = Consistency ✅Continuous Learning Opportunities ✅“Looking forward to Next Event” Culture ✅Increase Speaking Opportunities ✅Operational Know-how Accumulation Jan Seminar CCC Spring Feb Seminar Mar Seminar CCC Fall
Value for developers Sustainable operations Corporate Sponsors Access to talented developers Brand recognition Recruitment opportunities Tech community contribution Community support itself = Corporate value Win-Win Partnership Not for only product promotion
technical topics Enhanced Community Engagement "I can speak too" mindset Activated Knowledge Sharing Information exchange at various levels Next-gen Speaker Development Discovering future community leaders
Java specifications. New ideas are submitted as JSRs (Java Specification Requests). An Expert Group writes the spec. It goes through public review and approval to become final. Individuals can register the JCP member.
public review, and approve the final release. Includes members from companies, organizations, and individuals. EC members are elected by JCP members. JJUG is directly involved in the development of Java specifications. Next election will be Nov. 4-17, 2025
Promote Active Participation Experience Organizer Perspective Discover Next-gen Leaders Distribute Operational Load Results We have 50+ volunteers at each CCC Many volunteers continue participating Stable community operations Volunteers become organizers Improved event quality Solution:
streaming technologies Exploring online-specific interaction methods Finding ways to keep participants engaged Keep community connections during the pandemic In addition… Speakers need to learn video editing Our Mission
to … Not just information sharing Create a community gathering place Enable direct participant conversations Build relationships, not just deliver content Technology delivers contents, but physical spaces create genuine connections Return to Offline Events We prioritize what we truly want to provide
events were popular but too costly Video recording needs are high ・but overwhelming to guarantee quality ・managing 50+ videos While respecting diverse needs, we explore ways to make on-site more attractive and accessible.
• Exploring 2-day conference format Hybrid Events Speaker Development • Finding new speakers • improving presentation skills Generational Transition • Preparing next generation of core members Current Challenges We Face Enhance Global Presence • Invite talented speakers and experts • Host international conferences (like Devoxx)
Community Conference Association” CCCA support events, coordination, and fund management for Java communities in Japan to they can focus on connecting people and technology.
Public reporting and community oversight Sustainability Legal framework & succession planning Risk management for stable operation Social Trust Stronger trust from sponsors & partners Greater influence in the Java ecosystem Foundation for Growth Systematic expansion of activities Wider impact on the community
are possible Events are not limited to Tokyo We can attend to Osaka, Sapporo, Fukuoka, and other Not only CCC, but also other meet-ups Japanese attendees are are polite and deeply focused on learning Few questions during Q&A But many people post on X about your session
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