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Welcome to OpenSearch Tokyo User Group ! OpenSearch Tokyo User Groupの第一回 ミートアップイベントを開催します！ OpenSearch は検索やObservabilityのワークロードのためのOSSです。 本イベントでは、第一回イベントということで、OpenSearchプロジェクトの概要やOSSの今後のロードマップ、OpenSearchのユーザからの体験話などをご紹介します。 扱わないトピック : AWSなどのベンダーサービス固有の話 イベント概要 日時: 2026年2月5日 (木) 18:30 開場 19:00-21:00 セッション 21:00〜懇親会 (22:00完全退館） イベント会場 Amazon Web Service Japan オフィス : 東京都品川区上大崎3-1-1 目黒セントラルスクエア21F (room number 21.001) https://maps.app.goo.gl/c1Zr7ff9kndRe2fGA タイムテーブル 1\. OpenSearch プロジェクト最新情報 2.ユーザーセッション① : 弥生株式会社 Kazuma Imaizumiさん * タイトル : OpenSearch Warm Tier設計の実践 - UltraWarm経験から学ぶIndex/Shard最適化 * 概要 : OpenSearchでのUltraWarm導入経験をもとに、OSS環境でも活用できるWarm Tier設計の実践的ノウハウを共有します。ISM（Index State Management）、Index、Shardの基本概念から、シャードサイズ設計のベストプラクティスと実運用での最適化、UltraWarmとWarm Tierで共通する設計考慮事項まで、具体的な設定例とともに解説します。実運用データ（週1TB、1,000以上のシャード、1シャード約100GB）での経験をもとに、理想と現実のギャップを踏まえた時系列データの効率的な管理とコスト最適化を目指す技術者向けの内容です。 3.ユーザーセッション② : Serverless Operations, Inc. Sonu Kimさん * タイトル : 「うまく言えない」検索を叶える ― OpenSearchと生成AIで作る類似プロジェクト検索 * 概要 : 「前に似たような案件があったはずだけど、どう検索すればいいか分からない」といった、うまく言語化できない検索が必要な業務があります。本セッションでは、OpenSearch を活用して類似プロジェクトを検索できる仕組みを構築し、業務に合わせて「何をどの程度似ていると判断するか」を柔軟にチューニングできる検索体験を実現した取り組みについてお話します。 また、あいまいな検索条件でもユーザーが求める情報に辿り着けるよう、生成AIを用いてデータを前処理・構造化するアプローチや、検索精度を高めるための工夫についても合わせてお伝えします。 4.ユーザーセッション③ : 株式会社ラクス Nobuhiro Inaguma さん * タイトル : VectorDBとしてのOpenSearch\~5,000万件超のベクトル検索をコストを抑えて運用する技術選定\~ * 概要 : 全文検索・分析基盤として知られるOpenSearchは、実は大規模なベクトル検索にも活用できます。本セッションでは、5,000万件超のベクトルを対象に、ベクトルDB導入時に課題になりがちなメモリコストの増加を、Disk-based vector searchの活用で抑えた事例をご紹介します。 懇親会について セッション終了後、簡単な軽食とドリンクをご用意する予定です。 \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- OpenSearch Tokyo User Groupについて OpenSearch Project Tokyo ユーザーグループは、OpenSearch ユーザーを中心としたコミュニティです。オープンソース版の OpenSearch、各種マネージドサービス上で実行されている OpenSearch エンジンをご利用の方は是非ご参加ください。ユースケースは検索に限定されません。分析、可視化など、OpenSearch がカバーするあらゆるトピックについて情報・意見交換していきましょう。 Welcome to the OpenSearch Tokyo User Group! We are hosting the first meetup event of the OpenSearch Tokyo User Group! OpenSearch is an open-source software for search and observability workloads. At this inaugural event, we will be introducing the overview of the OpenSearch project, the roadmap for the open-source software, as well as experiences shared by OpenSearch users. Topics we will not cover: Specific topics related top services provided by vendors like AWS. Event Details Date & Time: Thu,Feb,5 2026 \- 6:30 PM Doors open \- 7:00 PM \- 9:00 PM Sessions \- 9:00 PM \- 10:00 PM Networking \(complete departure by 10 PM\) Venue Amazon Web Services Japan Office: Meguro Central Square, \*-\*-\*, Kamiosaki, Shinagawa-ku, Tokyo 21F (room number 21.001) https://maps.app.goo.gl/c1Zr7ff9kndRe2fGA Agenda TBD Networking After the sessions, we will provide light refreshments and drinks. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- About the OpenSearch Tokyo User Group The OpenSearch Project Tokyo User Group is a community centered around OpenSearch users. If you are using the open-source version of OpenSearch or the OpenSearch engine running on managed services, please join us. The use cases are not limited to just search - we will also discuss topics around analytics, visualization, and any other areas that OpenSearch covers.

Ukulele Club is a fun group for all ages and skill levels! There is no teacher, but we all help teach each other. Think of songs you would like to learn, and we can learn them together. If you don't have an ukulele, we have extra ukuleles When: *almost* Every Saturday, 10am-11:30am Admission: food/drink order

Our group, KIND MEALS, will be picking up the tab for pizzas, at MIKEY'S LATE NIGHT SLICE, on Sunday, February 8th from 12-2pm. We will be trying out MIKEY'S Vegan Fake-ass BBQ Chick'n pizza and Vegan Fake-ass Pepperoni pizza, as well as some other special vegan pizzas that are served there. All the vegan pizzas are covered with Selfish Cow vegan cheese. The pizza is free, drinks on your own. Join us to learn more about **[KIND MEALS](https://kindmealscolumbus.org)** (a 501c3 nonprofit organization based in Cols. Ohio, providing hunger relief services to those in need). All of the food we serve is fresh and vegan! If you love working with community, being of service, looking to hang with some fun like-minded people, and just love to socialize on a Sunday afternoon, join us for some FREE vegan pizzas at MIKEY'S LATE NIGHT on 4th and Main. Mikey said the more the merrier!

Beginner Zouk Class & West Coast Swing Social Every First Friday of the Month $20 WCS class or party \| $25 for both Zouk class included with party Beginner Zouk class Friday Feb 6 at Crystal Ballroom's West Coast Swing party. Catch the WCS class at 7pm, followed by Zouk in the small ballroom from 8-9pm. If enough people turn out, I’ll play Zouk mixes in the small ballroom for y’all after class, and you're welcome to explore both rooms. No partner, no problem. We suggest bringing a water bottle and non-grippy shoes if you have them. I look forward to dancing with you! 7pm: West Coast Swing Class * Intro to WCS \| small ballroom * Continuing WCS with Corrine Smith \| main ballroom 8pm \- 9pm: Intro to Zouk \| small ballroom 8pm \- 10:30pm: WCS Social \| main ballroom Present. Connected. Beautifully Imperfect. We are **Ensō** dancers

Start the year surrounded by Love From the Earth—with delicious vegan eats, sweet treats, artisan goods, and a chance to win one of our raffle baskets filled with plant-based goodies. Support small businesses, enjoy great food, and spend a cozy day with the community. We will reserve a table for this group if there is enough interest. Just comment "interest" below. Don’t miss out—see you there! Check [event page](https://www.facebook.com/events/893838639773267/) for a vendor list.

If you enjoy knitting, crocheting, working with yarn, this is the group for you. Meet new friends, bring your projects, learn from others.
We normally meet a few times a month during the week from 6-8pm. We will occasionally meet on weekends during daytime hours.

Join us on February 14th from 2–5 PM for a cozy and fun Valentine’s Day gathering! Start by grabbing lunch at **Portia’s Café**, then head next door to **The Cozy** for crafts, activities, and a relaxed space to celebrate the day together. **Date:** February 14 **Time:** 2:00–5:00 PM **Location:** The Cozy (next to Portia’s Café)

Sleep in on Sundays. When you've had your fill of pajama-time, roll out and have some tasty brunch with your fellow Humanists!

Please Join Us For The Winter Session Of Family-to-Family Winter session of F2F dates are Feb 12 – Apr 3 [https://namifranklincounty.org/family-to-family/](https://namifranklincounty.org/family-to-family/).