Content Strategy

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

Join members of the local UX and Digital Design community for a casual monthly breakfast. There _might_ be a little snow, but there _will_ be effectively infinite serve-yourself coffee, so it evens out if you ask me. Just a reminder, while the other locations are great too, we’re at the Lane Ave one this time.

**Caller: Dan Kappus** **Band: Trillium** **Big Scioty Contra Dance** **temporarily returning to our long ago location for Jan-March - First Congregational Church, 444 E. Broad St., Columbus 43215** WHAT IS CONTRA DANCING? Picture the Grand Ball scenes like you’ve seen in period films such as “Pride and Prejudice”, where the dancers are lined up in long lines, across from each other. That’s English Country Dancing, the predecessor of contra dancing. Now, add moves like “swing your partner” and “do-si-do,” like you’ve seen in square dancing. Set it to fabulous, high energy, live music with fiddles, guitars, percussion and more, alá “Riverdance.” Finally, set the whole scene down in the middle of Woodstock, with a hip, groovy atmosphere, a bit of tie-dye, and hints of counter-culture attitude. THAT’s Contra Dancing! Wear cool and comfortable clothes (you will get warm) and clean shoes that won't mark up our nice wood floor. Be sure to come for the beginner's lesson from 7:30 - 8:00, followed by dancing 8:00 - 10:30. All dances are taught; we will help you learn! Beginners always welcome, no need to bring a partner. Cost is $10.00 adults, $5.00 ages 12-26. Under 12 free. Free parking in church lot. For more information contact me or check out our website: [www.bigscioty.com](http://www.bigscioty.com/) Please bring your own refillable water bottle. Snacks to share are always welcome!

# **Band: Old Possum's Menagerie; Caller: Richard Ades** Beginner lesson at 1:30, regular dancing begins at 2:00 pm NOTE THAT WE ARE TEMPORARILY DANCING IN THE AFTERNOON INSTEAD OF EVENING. Dance with us in the afternoon then you can still go out in the evening! **Sponsor: All Soles Contra and Square Dancing, First Unitarian Universalist Church, 93 W. Weisheimer Rd., Columbus OH 43214** WHAT IS CONTRA DANCING? Picture the Grand Ball scenes like you’ve seen in period films such as “Pride and Prejudice”, where the dancers are lined up in long lines, across from each other. That’s English Country Dancing, the predecessor of contra dancing. Now, add moves like “swing your partner” and “do-si-do,” like you’ve seen in square dancing. Set it to fabulous, high energy, live music with fiddles, guitars, percussion and more, alá “Riverdance.” Finally, set the whole scene down in the middle of Woodstock, with a hip, groovy atmosphere, a bit of tie-dye, and hints of counter-culture attitude. THAT’s Contra Dancing! Wear cool and comfortable clothes (you will get warm) and clean shoes that won't mark up our nice wood floor. Be sure to come for the beginner's lesson from 1:30 - 2:00, followed by dancing 2:00 - 430. All dances are taught; we will help you learn! Beginners always welcome, no need to bring a partner. Cost is $10.00 adults, $5.00 ages 12-26. Under 12 free. Free parking in church lot. Please bring your own refillable water bottle.

We'll meet at The Capital One Café, 167 Easton Town Center, Space A-103. This is in the main mall where the Microsoft store used to be, on your left if you're standing at the bottom of the AMC Theater escalator. Join us on Sunday for an hour of uninterrupted wordmaking! • What we'll do Join us for an hour of writing! We’ve discovered that it’s strikingly helpful to write with other writers. See if it’s true for you at noon on Sundays. Be it a book, blog, script, essay, dissertation, resume, melody, poem or just plain work stuff, you are invited to write it with us. No one will see what you've written or give you unsolicited advice. Instead of just thinking about writing, come and get some real writing done. SCHEDULE: 12:00 - quick intros. 12:10 - timer starts: write for 1 hour. 1:10 - chat / take off / keep writing. OPTIONAL SOCIALIZING happens at 1-1:30ish. Writing is very solitary. Connecting (and sometimes even commiserating) with other writers is a cool thing. BEING LATE IS OKAY: just show up and get settled, then check-in with me after the session. If you were on time, please be willing to make room for the friendly latecomer. Happy writing and I look forward to seeing you! • What to bring Whatever you need to be able to write! Bring earbuds/earplugs if you want to block noise or the occasional conversation by other patrons. Electrical outlets are limited, so charge your devices before whenever possible. See you at The Café on Sunday!

***(She loves me!)* A Brief History of Quarry Trails** [Quarry Trails Metro Park](https://www.metroparks.net/parks-and-trails/quarry-trails/) traces its origins to a vast limestone quarry operated by the Marble Cliff Quarry Company starting in the early 20th century. The site, located along the Scioto River west of downtown, supplied crushed stone for local construction projects and roads throughout central Ohio. Operations peaked mid-century, with massive excavation creating deep pits and steep cliffs that reshaped the landscape. By the 1980s, demand declined, and the southern section of the quarry closed (with the northern section of the quarry remaining in operation to this day by a separate company), leaving behind scarred terrain and abandoned equipment. Environmental concerns arose as the area became a dumping ground and off-road playground for locals. Columbus Metro Parks began eyeing the property in the 1990s for potential reclamation into public green space. In 2015, Metro Parks acquired the initial 180 acres from the quarry's owners, marking a pivotal step toward transformation. Thrive Companies, a local developer, partnered in the deal to build adjacent housing while funding park improvements. Cleanup efforts removed tons of debris, stabilized cliffs, and addressed water quality in the flooded quarries. Planners envisioned a mix of adventure and preservation, incorporating the site's industrial remnants as features. Community input from nearby Grandview Heights and Hilliard residents shaped early designs. The project gained momentum with state and federal grants supporting habitat restoration. The park officially opened its first phase in November 2021, featuring 3.5 miles of trails, a waterfall overlook, and climbing walls on the quarry faces. Visitors quickly embraced the unique terrain, with mountain biking loops and a 25-foot waterfall drawing crowds from across the metro area. Metro Parks added a canoe/kayak launch on the Scioto River, connecting to the city's broader trail network. Dog parks and picnic areas rounded out the amenities, making it a year-round destination. Expansion continued with land acquisitions pushing the total toward 600 acres. By 2023, the park hosted events like guided hikes and birdwatching tours. Ongoing development includes a planned adventure center with zip lines and more extensive single-track trails set for completion in the coming years. Metro Parks collaborates with conservation groups to plant native species and monitor wildlife returning to the reclaimed quarries. The site now serves as an educational hub, with interpretive signs explaining its quarrying past and ecological recovery. Local schools incorporate field trips to study geology and restoration science. Quarry Trails exemplifies Columbus's shift from industrial reuse to innovative urban parks. It stands as the newest addition to the Metro Parks system, complementing favorites like Scioto Audubon and Highbanks. Today, Quarry Trails continues evolving, with future phases adding connections to the Olentangy Trail and more water access points. Annual visitor numbers have surged, boosting nearby businesses in the evolving west side neighborhoods. The park's success has inspired similar reclamation projects elsewhere in the region. It highlights how Columbus balances growth with green space preservation. Residents enjoy a one-of-a-kind spot that honors the area's gritty history while offering modern recreation. Quarry Trails remains a testament to community vision and adaptive reuse in our city. ***(She loves me not.)* A Briefer History of Valentine's Day** The origins of Valentine's Day trace back to ancient Rome and the festival of Lupercalia, celebrated in mid-February to honor fertility and purification rites. During this raucous event, young men drew names of women from a box in a matchmaking lottery, often leading to pairings or marriages. By the late 5th century, Pope Gelasius I officially replaced Lupercalia with St. Valentine's Day on February 14 to Christianize the pagan holiday. Although several early Christian martyrs were named Valentine, the most commonly associated figure is a 3rd-century Roman priest who secretly married couples against Emperor Claudius II's ban on young men marrying, believing single soldiers fought better. Legend claims Valentine was imprisoned and later executed on February 14, around 269–270 AD. The romantic associations with Valentine's Day emerged much later, during the Middle Ages. The pivotal moment came in the late 14th century when Geoffrey Chaucer, in his poem "Parlement of Foules" (c. 1381), linked St. Valentine's Day with courtship, writing that birds chose their mates on this date. This literary connection spread rapidly among the English and French nobility, transforming the saint's feast day into a celebration of romantic love. By the 15th century, lovers began exchanging handwritten notes called "valentines," often containing verses or simple declarations of affection. In the 18th and 19th centuries, Valentine's Day became increasingly commercialized, especially in England and later the United States. The introduction of printed valentines in the 1840s, pioneered by Esther Howland in America, turned personal notes into mass-produced cards adorned with lace, ribbons, and Cupid imagery. Factories began producing elaborate cards, and the tradition of giving flowers (especially roses), chocolates, and jewelry took hold during the Victorian era. Today, February 14 is one of the most widely celebrated secular holidays worldwide, generating billions in spending on cards, candy, flowers, and romantic dinners. While still officially the feast day of Saint Valentine in some Christian traditions, the modern version has largely shed its religious roots in favor of universal expressions of love and friendship. From ancient fertility rites to global commercial phenomenon, Valentine's Day has evolved dramatically over two millennia while retaining its core focus on human connection. ***(She loves me!)* Map of the Park** Here is a [Map of Quarry Trails](https://www.metroparks.net/wp-content/uploads/2025/09/Quarry-Trails_JUNE-2025_1980px-Web.jpg). ***(She loves me not.)* Summary** For this hike, we'll do a loop of the park. This will be about four miles. Now, this won't be one of our longer hikes. However, in my experience, Quarry Trails tends to wear people out more quickly than other parks. I suspect this is because most of the trails are either paved or heavily graveled (no surprise at a park which abuts an active stone quarry), with some elevation changes along the way. ***(She loves me!)* Where We'll Meet** Quarry Trails has multiple entrances, but none of them are connected internally within the park. So you must drive to the correct one for this event. Set your GPS to [2319 Quarry Trails Dr, Hilliard, OH 43026](https://www.google.com/maps/place/2319+Quarry+Trails+Dr,+Hilliard,+OH+43026/@39.9998462,-83.0873077,17z/data=!3m1!4b1!4m6!3m5!1s0x883891dd76f5eedf:0xf1cb9d34c1069580!8m2!3d39.9997868!4d-83.0872621!16s%2Fg%2F11y17k0ms5?entry=ttu&g_ep=EgoyMDI1MTExMi4wIKXMDSoASAFQAw%3D%3D), or use the map pin I've provided here. Do not just type "Quarry Trails" into Google Maps and expect it to take you to the correct place. It probably won't. We will meet in the parking lot of the Lake Area. The best entrance to this parking lot will be your first left off of Quarry Trails Dr after Gunnison Dr (which will be on your right). I recommend taking a few minutes and looking at Maps before you head out to make sure you know where you're going. ***(So walk with me...)* Restrooms and Water Fountains** There are a few port-a-potties sprinkled throughout the park (including two at the parking lot we'll be meeting at), and the Park Office, roughly in the center of the park and which we'll pass twice on this hike, has restrooms and a water fountain. This is the only water fountain, though, at Quarry Trails. ***(At Trails Quarry!*)** **After the Hike** Afterward, we'll head over to [Johnnie's Tavern](https://johnniestavern614.com/) for [drinks](https://www.google.com/maps/place/Johnnie's+Tavern/@39.993202,-83.0903169,3a,75y,90t/data=!3m8!1e2!3m6!1sCIABIhAulLarLYZC3hY_vRGwoakV!2e10!3e12!6shttps:%2F%2Flh3.googleusercontent.com%2Fgps-cs-s%2FAG0ilSzkwnMN29-lrgzp50Rzeaq5jXCGM1xLS1poH0Mc52-E9NYBvdS99ei7zGmlAYJZyk8OeNW5YvS7agj8M2Bom4ri1m_-NcJiT-LQUDphkS-SB5Vq8JhO-8NSP-_m80HeLz4-pGhjrwhuBKSv%3Dw146-h195-k-no!7i4284!8i5712!4m7!3m6!1s0x883891c4d61ba04d:0x5134f225cbf678bf!8m2!3d39.9932439!4d-83.0902078!10e9!16s%2Fg%2F11c1p57s3t?entry=ttu&g_ep=EgoyMDI1MTExMi4wIKXMDSoASAFQAw%3D%3D) and [food](https://www.google.com/maps/place/Johnnie's+Tavern/@39.993202,-83.0903169,3a,75y,90t/data=!3m8!1e2!3m6!1sCIABIhB5lD4Uly_4O9BjNH4r3ywB!2e10!3e12!6shttps:%2F%2Flh3.googleusercontent.com%2Fgps-cs-s%2FAG0ilSy7tQcc7CtCeuUAKwEVJoxtOs8Ycohjy3mGZZOC_kJVdB8wEaGuC4-p5z_jxn2JnpmSEkh_HG7Aok_ZPEgmK57rEBqNIPH8J5tiyAP5vbrRYkUso_fKTkW5vJc47UusNoGiRzs2Vf0m1JcV%3Dw146-h195-k-no!7i4284!8i5712!4m7!3m6!1s0x883891c4d61ba04d:0x5134f225cbf678bf!8m2!3d39.9932439!4d-83.0902078!10e9!16s%2Fg%2F11c1p57s3t?entry=ttu&g_ep=EgoyMDI1MTExMi4wIKXMDSoASAFQAw%3D%3D). Its actual address is [3503 Trabue Rd, Columbus, OH 43204](https://www.google.com/maps/place/3503+Trabue+Rd,+Columbus,+OH+43204/@39.9932491,-83.090227,17z/data=!3m1!4b1!4m6!3m5!1s0x883891c4d6199677:0x1fda03b0add81e7c!8m2!3d39.9932491!4d-83.090227!16s%2Fg%2F11c14yf3m6?entry=ttu&g_ep=EgoyMDI1MTExMi4wIKXMDSoASAFQAw%3D%3D), and it's only about a five minute drive from where we'll be parked at Quarry Trails. We should be at the tavern by 5 if you can't make the hike and just want to meet us for drinks.

Join the Columbus Ski Club for a First Friday Happy Hour! If you're new in town or just looking to socialize, this is the event for you. Connect with fellow sports enthusiasts and outdoor adventurers while sharing travel stories and tips for the best ski slopes or hiking trails. Contact: Herb Beidel, 614 -619-7808 [Dec_2025_CSC_Track Newsletter.pdf]() CSC Membership not required for happy hour!