Cassandra Summit Tokyo 2017

Thursday, October 5, 2017


Theme Cassandra Now and the Future
Date Thursday, October 5, 2017
Time 10:00 AM - 6:15 PM JST
Location Belle Salle Tokyo Nihonbashi,
Tokyo Nihonbashi Tower 4F, 2-7-1 Nihonbashi, Chuo-ku, Tokyo, JAPAN
Fee Free
Capacity 500
Who Should Attend People and companies who are considering or using Cassandra.
Organizer The Japan Cassandra Community


This is the Apache Cassandra Summit Tokyo event centered around Apache Cassandra, a NoSQL database. This year, we have expanded the event to be a whole day with Microsoft Japan sponsoring the lunch sessions. Considering the proliferation of Cassandra's production use in businesses, there will be various production business use case tracks and technology sessions as well as beginner sessions for those who have recently started/restarted the use of Cassandra. Last but not least, the Chair of the Apache Cassandra project as well as Committers will also be here to talk about the ins and outs of Cassandra.


Location Belle Salle Tokyo Nihonbashi,
Tokyo Nihonbashi Tower 4F,
2-7-1 Nihonbashi, Chuo-ku, 103-0027
Tokyo, JAPAN

View with larger map
Stations nearby "Nihonbashi Station" B6 Exit - direct (Ginza line, Tozai line, Asakusa line)
"Tokyo Station" Yaesu North Exit - 6 minute walk (JR line, Marunouchi line)
"Mitsukoshi-Mae Station" B6 Exit - 3 minute walk (Ginza line, Hanzomon line)


Time Track1 (Room B) Track2 (Room C) Track3 (Room D) Track4 (Room E)
10:00-11:00 Keynote
Nate McCall (The Last Pickle)
11:00-12:00 Japan Cassandra Community
12:00-13:00 Lunch Session
Powered by Micorosoft
13:00-13:15 partition change
13:15-13:45 Ben Slater
Satoshi Konno
Koji Kishimoto
Mao Ito
(A Teradata Company)
13:45-14:15 Yuji Ito
Yuto Tsutsumi
(Works Applications)
Shiho Muraoka
14:30-15:00 Aaron Morton
(The Last Pickle)
Masahiro Kobayasi
Junpei Tomohiro
(Softbank Corporation)
Sahar Benarfa
Shogo Hoshii
(Yahoo Japan Corporation)
15:00-15:30 Shinpei Soda
15:45-16:15 Jason Brown
(Apple Computer)
Takashi Narita
Kota Hutami
(Works Applications)
Yuki Morishita
(DataStax Japan)
17:00-17:30 Social gathering preparation     Kazutaka Tomita
18:00-20:30 A social gathering
Powered by Yahoo! Japan


Nate McCall

The Last Pickle

Nate McCall is an Apache Cassandra Commiter and currently the Project Chair for the PMC. He has over 17 years of experience in server side systems and software development. Nate is also the co-founder and CTO of The Last Pickle (

Session Content

T.B.D (The session will be in English)
Aaron Morton

The Last Pickle

Aaron Morton is the Co Founder at The Last Pickle ( A professional services company that works with clients to deliver and improve Apache Cassandra based solutions. He's based in New Zealand, is an Apache Cassandra Committer and PMC, and a DataStax MVP for Apache Cassandra.

Session Content

T.B.D (The session will be in English)
Jason Brown

Apple Computer
Apache Cassandra Commiter

Jason Brown is an active member of the distributed systems community, with a predilection for gossip/epidemic dissemination systems. He is a committer and PMC member of the Apache Cassandra project. Jason has a Master's degree in Music Composition, and is desperately searching for time to compose another string quartet or another opera.

Achievement Unblocked: Switching Apache Cassandra to Netty and non-blocking I/O - A followup

In this talk we’ll cover the details of the implementation in Apache Cassandra 4.0 for migrating the internode messaging and streaming components from the current blocking IO to a netty-based, non-blocking IO solution. I’ll cover what needed to change in the internode communications protocol, how the handshake got remapped into the new handlers, how the pipelines are dynamically constructed and updated, and the actually message/streaming processing. I’ll also cover how we can easily use the TLS components in netty to make the securing communication between nodes dramatically faster. (The session will be in English)

Yuki Morishita

Datastax Japan G.K.

Yuki Morishita, Apache Cassandra Committer and Solution Architect for DataStax Japan, has worked for an IT consluting firm as an architect before Joining DataStax, Inc in 2011 as an engineer to help develop and contribute to Apache Cassandra. He has been a Committer since May, 2012. He moved over to Japan in February 2017 to work as a Solutions Architect.

Session Content

Ben Slater

Chief Product Officer, Instaclustr

Instaclustr provides leading open source products such as Cassandra, Elassandra and Spark as a managed service in the cloud. As Chief Product Officer, Ben is charged with steering Instaclustr’s development roadmap, managing product engineering and overseeing the production support and consulting teams.
Ben has over 20 years experience in systems development including previously as lead architect for the product that is now Oracle Policy Automation and over 10 years as a solution architect and project manager for Accenture. He has extensive experience in managing development teams and implementing quality controlled engineering practices.

Session Content

Apache Cassandra Best Practices and Troubleshooting (The session will be in English)

With more than 12 million node hours of experience running Cassandra, and currently managing more than 200 clusters globally for a wide range of clients, Instaclustr has seen all the common pitfalls people encounter when getting started with Cassandra. In this presentation, we’ll examine:

  • Key best practices and important concepts to understand when getting started with Cassandra
  • Common pitfalls, how to identify them and what to do about them
Shogo Hoshii

Apache Cassandra Contributor,
Apache Cassandra Cluster Operations,
Data Platform Division, Data & Science Solutions Group,
Yahoo Japan Corporation


Shogo Hosii joined Yahoo Japan in 2011. He began using Cassandra in 2014 as a user, and moved over to the Cassandra Operations team in October 2015. Currently, while provisioning and managing the Cassandra clusters for internal services teams, he also contributes to the Apache Cassandra community.

Session Content

Yahoo! Japan's Current and Future Contributions to the OSS Community (The session will be in Japanese)

Many services of Yahoo! Japan use Cassandra, and there are currently over 2,000 nodes in production. There has been many operational challenges with having a broad user base and an enormous number of clients. This session will introduce how Yahoo! Japan has been contributing to the OSS community during the course of tackling these operational issues.
Satoshi Konno

NoSQL Team Leader,
Data Platform Division, Data & Science Solutions Group,
Yahoo Japan Corporation

Satoshi Konno joined Yahoo Japan 2005. He has been building and operating NoSQL internal platforms since 2012. He has personally been contributing to OSS development, with works being adopted by development projects and consumer products.

Session Content

Cassandra-related Trend Analysis and Use Case Introductions (The session will be in Japanese)

Introduction to the NoSQL trends and analysis surrounding Cassandra, and use cases based on Cassandra.
Mao Ito

Think Big Analytics, A Teradata Company
Senior Data Engineer


I used Cassandra for the first time when I was developing a system which can search product information. Since that, I am interested in applying Cassandra as a database for Machine Learning. In this Meetup, I will talk some topic about Cassandra as a community member.

Session Content

Cassandra Data Ingestion (The session will be in Japanese)

In Machine Learning and Data analysis, data cleansing and data wrangling are important tasks to gain better results. I will talk about how we can construct Data Lake Foundation for such tasks, using only open source technologies like Kylo and Cassandra. Also, by leveraging data ingestion tool like Kylo, can we make a future where we don’t need to worry about schema design anymore ?

Masahiro Kobayasi

Softbank Corporation
Message Platform Division, Service Platform Development Group

Junpei Tomohiro
Softbank Corporation
Server Platforn Operations Division, Network Operations Group

Session Content

Introduction to the Charm of Cassandra (The session will be in Japanese)

Introduction to the charm of Cassandra from the experince of designing, developing, and operating a large scale messaging platform which started its life in 2011.

Takashi Narita

Solution Architect, Amazon Web Services Japan K.K.

Speaker at Cassandra Summit Japan 2014 (session title "Cassandra 100 node cluster admin operation"). Takashi Narita built his career mainly as an infrastructure engineer at a Web IT company, with operating experiences of Cassandra 1.1.x and 2.0.x clusters. He currently works as a Solution Engineer and mainly provides technological advise for Web-based services and NoSQL-related data stores.

Session Content

Apache Cassandra on AWS (The session will be in Japanese)
Various customers are building and operating Cassandra clusters on AWS. AWS also has released a document titled "Apache Cassandra on AWS whitepaper". This session discusses about the content of the whitepaper in order to help build Cassandra clusters on AWS. Audience: Engineers who are already using either or both Cassandra and AWS, or who have plans to build Cassandra clusters on AWS.
Kazutaka Tomita

President, INTHEFOREST Co., Ltd.

Kazutaka Tomita has been involved in various aspects of designing, developing, building, operating, and managing databases as well as managing billing solution products, FX system operations, and working as DBA for a large restaurant search service. He has been periodically organizing Cassandra workshops since 2010 for the Cassandra workshop community. His company is one of the first commercial Cassandra supporting companies in Japan, and he is working enthusiasticaly to have people use Apache Cassandra.

Session Content

T.B.D (The session will be in Japanese)
Shiho Muraoka

Engineer, INTHEFOREST Co., Ltd.

Shiho Muraoka's main work includes building databases including Cassandra. She also gives overview sessions as well as use case sessions to spread the use of Cassandra.

Session Content

About Cassandra (The session will be in Japanese)

The interst that NoSQL has gathered in the age of Big Data is now moving into the phase of practical use. What kind of database is Cassandra? This session will introduce how to start up services with Cassandra as well as how to migrate from other data systems bases on numerous use cases.


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      If and when accepted by the registrant, personal information entered will be provided to the following third-party companies:
         Microsoft Japan Co., Ltd., INTHEFOREST Co., Ltd., DataStax Japan G.K., Instacluster, Yahoo Japan Corporation, UL Systems, Inc.
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