Scala Conference in Japan 2013

Saturday 2nd March 2013
Tokyo Institute of Technology - Ookayama Campus
(Tokyo Tech Front 1F - Kuramae Hall, Centennial Hall 3F - Ferrite Memorial Hall)

Click here for the PDF version of the timetable

Slide decks now available.

Time A (Kuramae Hall) B (Ferrite Memorial Hall)
10:00 - 10:10 Opening Speech
Speaker: Kota Mizushima (Scala Conference in Japan Committee)
10:10 - 10:50 「Up up and Out: Scaling Software with Akka」
Speaker: Jonas Bonér(Typesafe)
10:50 - 11:00 Break
11:00 - 12:10 「Geisha Tokyo and Scala - From 'Omiseya-san' to 'Brain Training Quest'」
Speaker: Yoshiaki Takeshita(Geisha Tokyo Entertainment)
「Data Stream Processing and Analysis with Akka」
Speaker: Roman Y. Shtykh, Mitsuharu Makita (CyberAgent)
「Scala in Model-Driven development for Apparel Cloud Platform」
Speaker: Tomoharu Asami(Everforth)
「Scala in our BRMS」
Speaker: Teppei Tosa (Mitsubishi UFJ Information Technology)
12:10 - 12:30 Lunch preparation -
12:30 - 13:40 Lunch time (Lightning talks)

Xitrum - a Scala framework inspired by Rails
Speaker:Ngoc Dao

How to send a pull req
Speaker:Eugene Yokota

Scala Case Study
Speaker:Kenichi Masuko(System Art)

Ascii Art in Scala
Speaker:Chris Birchall

Scala driven engineering life
Speaker:Yusuke Kuoka
13:40 - 14:50 「Coding in Style」
Speaker: Joshua Suereth(Typesafe)
Recruiting Sessions
Speaker: sponsors
「Scala ActiveRecord - The elegant ORM library for Scala」
Speaker: Yuki Yoshinoya (Advanced Soft Engineering)
14:50 - 15:10 Break
15:10 - 16:20 「Effective Actors」
Speaker: Jamie Allen(Typesafe)
「Composable Action Composition with Stackable Trait in Play 2.1」
Speaker: Manabu Nakamura(Tech to Value)

「Scala in DWANGO "niconico Android"」
Speaker: Tetsushi Goto (DWANGO)

「How we write and use Scala libraries not to cry」
Speaker: Toshiyuki Takahashi(M3)

「The Tech Behind Otome Games」
Speaker: Daisuke Kasuya(Furyu)
「Scala as "Better Java" from object-oriented viewpoint」
Speaker: Shinya Mochizuki
16:20 - 16:40 Break
16:40 - 17:50 「Scala frustrations: A case study of Play2 system development」
Speaker: Naoki Takezoe (NTT Data Intellilink)
「Social app development with 2 month study of Scala+Play!」
Speaker: Junichi Okamura (Shanon)
「Play Framework - The modern web framework that packs a punch」
Speaker: James Roper (Typesafe)
「Scala Bot for Small Business」
Speaker: Yung-Luen Lan
17:50 - 18:00 Break
18:00 - 18:30 Ending

The after party will start at 19:30. Check here in detail.

Jonas Bonér (Typesafe CTO, Akka developer)

Jonas-Boner Up up and Out: Scaling Software with Akka

We believe that one should never have to choose between productivity and scalability, which has been the case with the traditional approaches to concurrency and distribution. The cause of that has been the wrong tools and the wrong layer of abstraction and Akka is here to change that. Akka is a unified runtime and programming model for scaling both UP (utilizing multi-core processors) and OUT (utilizing the grid/cloud). With Akka 2 this will be taken to a whole new level with its "Distributed by Design". Akka 2 provides location transparency by abstracting away both these tangents of scalability by turning them into operations and configuration task. This gives Akka runtime the freedom to do adaptive automatic load-balancing, cluster rebalancing, replication and partitioning. Akka is available at (under Apache 2 license).

Jonas Bonér is a geek, programmer, speaker, musician, writer and Java Champion. He is the CTO and co-founder of Typesafe and is an active contributor to the Open Source community; most notably founded the Akka Project and the AspectWerkz AOP compiler (now AspectJ). Learn more at:

James Roper (Typesafe, Play core member)

James-Roper Play Framework - The modern web framework that packs a punch

As the focus of modern web applications shifts to be more and more about providing rich user experiences, and hardware evolves not to be faster but to provide more and more CPU cores, many web frameworks have been left behind, unable to meet the demands of a modern web application.

Play Framework is the answer to these new demands, providing first class support for current web standards such as WebSockets and technologies such as LESS, requireJS and CoffeeScript, while providing the power of asynchronous IO and parallel processing using simple and concise syntax on the backend. This presentation will give you a taste of just how simple Play Framework makes modern web application development, showcasing support for the latest technologies in a development environment that is powerful and productive.

James Roper is an open source developer with a passion for helping developers to produce great software. James started out as an enterprise Java developer, before moving to Atlassian where we specialised in developing Atlassian's hosted offerings of their world class enterprise development tools. He now works for Typesafe as a core developer on Play Framework, and frequently blogs and speaks on technical topics in relation to Play, Scala, and whatever else happens to tickle his fancy.

Joshua Suereth (Typesafe, Scala team member, author of Scala in Depth)

Joshua-Suereth Coding in Style

Scala is an expressive language, but can be hard to grasp when coming from imperative languages. The key is understanding what expression is in Scala, and how to adapt code to be more expressive. This talk covers the 'zen' of Scala development, as well as what changes the new features in Scala 2.10 bring. In particular, we cover:

  • Expression oriented programming and basic functional programming
  • Simplicity in Design
  • Enhancing libraries with Implicit classes and value classes
  • Dynamic types for DSLs
  • Reflection as a platform to write macros
  • Macros and Rainbow Explosion Powers

Josh Suereth is a Senior Software Engineer at Typesafe and the author of "Scala In Depth". He has been a Scala enthusiast ever since he came to know this beautiful language in 2007. He started his professional career as a software developer in 2004 using programming languages like C++, Perl and Java. In 2009 he began writing the book "Scala In Depth" which provides practical support for using Scala in every day applications. Josh regularly shares his expertise in articles and talks.

Jamie Allen (Typesafe Consultant)

Jamie Allen Effective Actors

There are several frameworks across languages and platforms of Actors, including Erlang, Fantom, Java and Scala. As developers have built systems using these frameworks, patterns of use have begun to emerge that represent "Best Practices" for actor-based systems. In this talk, we will review such patterns, focusing primarily on how to implement them using the Akka framework and Scala.

Jamie Allen has over 18 years of experience delivering enterprise solutions across myriad industries, platforms, environments and languages. He has been developing enterprise applications with Scala since 2009, primarily using Actors for fault tolerance and managing concurrency at scale.

Yoshiaki Takeshita (Geisha Tokyo Entertainment, Inc.)

Takeshita Geisha Tokyo and Scala - From 'Omiseya-san' to 'Brain Training Quest'

Beginning with the development of 'Omiseya-san for GREE', one of the most popular social games implemented in Scala in Japan, we have been using Scala as our main development language for the last 3 years. We present our reasons for choosing Scala, our experiences integrating Scala into our development process, and an introduction of various technologies that we have found useful. Hopefully our know-how, developed over the last 3 years of running Scala-based services in production, can be of use to anybody planning to build products and services with Scala in the future.

Yoshiaki Takeshita
Yoshiaki received his Master's degree from the Graduate School of Agriculture and Life Sciences, University of Tokyo. After working for Geisha Tokyo Entertainment part-time at university, he refused an offer from a major game maker and decided to join Geisha full-time. Working mostly on the server side, he also does some development work on the iPhone clients. He was part of the team behind the ground-breaking 'augmented reality doll' ARis, and engineering lead for the popular game 'Omiseya-san'. He is currently working as engineering lead on a new title. Yoshiaki was the instigator of the Scala revolution at Geisha Tokyo.

Roman Y. Shtykh, Mitsuharu Makita (CyberAgent Inc. Ameba Technology Laboratory)

Data Stream Processing and Analysis with Akka

In this presentation we will share our experience of building a distributed platform for event data stream processing and analysis with Akka 2.0. From the perspective of a Java developer, we will explain the role of Akka framework in our platform, why it is chosen, and how it helps achieving fault-tolerance and scalability when working with large volumes of data.


Roman Y. Shtykh
Roman Y. Shtykh joined CyberAgent Inc. in 2012 as R&D engineer. Prior to that, he gained extensive experience in R&D in embedded systems, design and development of large scale e-commerce platforms and distributed search solutions. His research interests are in information retrieval and distributed computing.

Mitsuharu Makita
Mitsuharu Makita is an R&D engineer with solid experience in search engine, machine translation, and natural language processing technologies. His current interests are search engine log analysis, personalized information processing and machine learning.

Tomoharu Asami (Everforth Co., Ltd.)

No Image Scala in Model-Driven development for Apparel Cloud Platform

We develops a cloud platform for Apparel industry using Model-driven development. In the development, we develops one model compiler and two server-side frameworks using Scala. In addition, we uses various Scala-based OSS products, such as play-framework and Squeryl. In this session, I talks abount programming strategy and tips for Scala, which are based on our experiences in the development.

Everforth CTO

Teppei Tosa (Mitsubishi UFJ Information Technology, Ltd.)

Teppei Tosa Scala in our BRMS

We are developing our original BRMS(Business Rule Management System). Our BRMS has the original feature that can execute logic from not only conditions but also expected results. Tha main programing language for the BRMS is Scala. I am going to introduce how we use Scala's feature and how we evaluate Scala.

I work as the research-and-development manager at MUIT which is MUFG's IT company. MUFG, which includes Bank of Tokyo Mitsubishi UFJ, is the top financial institution in Japan.

Yuki Yoshinoya (Advanced Soft Engineering Co., Ltd.)

Yuki Yoshinoya Scala ActiveRecord - The elegant ORM library for Scala

Scala Activerecord is an ORM library for Scala (under MIT license).
This talk covers features, comparison with other database libraries and future prospects.

I'm working for Advanced Soft Engineering Co., Ltd. Scala & Rails programmer. [github]

Shinya Mochizuki

No Image Scala as "Better Java" from object-oriented viewpoint

Scala is static typed programming language supports functional programming is based on object-oriented. We often talked about Scala from functional language viewpoint, but object-oriented viewpoint is not. In this talk, I will explain improvement by comparison between Scala and Java as object-oriented language.

Software engineer at Lepidum Co. Ltd developed Android application and API Server using Play framework. By Scala, of course :)

Manabu Nakamura (Tech to Value Co.,Ltd.)

Manabu Nakamura Composable Action Composition with Stackable Trait in Play 2.1

Play 2.x enables you to readily add features to your code by composing Actions. Doing it the usual way, however, you have to write a lot of boilerplate code when you want to reconfigure composed actions, because the order of composition is fixed from the start.
This kind of problem can be solved by ThreadLocal or AOP in Java, but you can't do the same way in Play 2, because it has the potential to execute a single action on multiple threads.
Therefore, I developed a new Action Composition Library for Play 2, that can easily configure an order of actions by using Stackable Trait Pattern.

The stackable trait is a powerful feature but rarely seen in the real world. This presentation will introduce it by taking my library as an example.

Manabu Nakamura is the CEO of Tech to Value. We do web development and consult IT systems mainly by Scala.

Tetsushi Goto (DWANGO Co., Ltd.)

Tetsushi Goto Scala in DWANGO "niconico Android"

Android application for niconico:
API servers for the above application and the administration system are built with Play! Framework 2.0(Scala). In this talk, I will share our experiences on how to develop in Scala.

Tetsushi Goto(

Toshiyuki Takahashi (M3, Inc.)

Toshiyuki Takahashi How we write and use Scala libraries not to cry

We, M3 engineering group is using Scala as one of the programming Language. We have launched many serivces and in-house systems with various Scala libraries such as Scalatra, Unfiltered and Playframework. Some of them are avalilable under the open source licences. With the increase of libraries, we are often in trouble with management and maintenance of them. The problem occurs with any programming language, but we also have to be careful with the problems that are unique to Scala. I will organize the answers and work-arounds to get along with Scala libraries from the aspects of both a user and an author. Let's think together about what we can do to keep us from unnecessary troubles and create the better ecosystem for Scala.

I'm developing the website for medical service workers named as a member of the engineering group at M3,inc. I have been using Scala as my primary programming language since I found it two and a half years ago. I am also one of the founders of ScalaJP.


Daisuke Kasuya The Tech Behind Otome Games

Last year we released three social 'otome games' for female players, developed using Play! 2 and Scala. Starting from a point where most of the development team had zero Scala experience, and learning as we went along, we managed to successfully release our products. This presentation will be reasonably non-technical, and will discuss the various techniques we used to learn Scala as a team and bring our skills up to production level.

Daisuke Kasuya
Daisuke joined the company in 2011. He develops social games in Play! 2.0 and Scala.

Naoki Takezoe (NTT Data Intellilink Corporation)

Naoki Takezoe Scala frustrations: A case study of Play2 system development

Our team began to test Scala two years ago, and now it becomes a main development language for our business. We wrote a book "PROGRAMMER'S RECiPE for Scala" (Scala逆引きレシピ) based on our experiences.

Scala is a great and convenient "Better Java" language in many cases, but we also found it isn't always a good thing. In this talk, I will share pitfalls of using Scala in system development learning through our actual experience.

Naoki Takezoe is a Software Engineer at NTT Data Intellilink Corporation.

Junichi Okamura (Shanon, Inc.)

Junichi Okamura Social app development with 2 month study of Scala+Play!

The experiments of BtoB social app development with Scala+Play by an ex-Java engineer only in 2 month study. Advantages of Scala for Java engineers , code porting issues, learning cost, effective points for enterprise software, etc.

Developer of marketing and event solution products with Scala+Play in Shanon, Inc.
Twitter: @benzookapi

Yung-Luen Lan

Yung-Luen Lan Scala Bot for Small Business

For small business, scalability is not the only issue to address. Instead, making daily jobs fun and easy by scripting is important in most cases. Scala is not well known as a scripting language because of the JVM boot-time overhead. In this talk, I will share my experiences on how to build a robot in scala to automate tasks in our company.

Cocoa / Scala developer in Taiwan. Co-founder of hypo. Scala ninja rookie.

After party

At Casa Giardino.

Time 19:30 - 21:30
Place Jiyuugaoka Casa Giardino

Google Map
Price 5,000 yen

Scala Hack-a-thon

Event Info

The Scala Hack-a-thon is a fun and relaxing wind-down event to be held the day after the conference. The event will include:

  • Scala Programming Contest
  • Talks by the Attendees
Two of the Typesafe guest speakers will attend this event. A prize will be awarded to the winner of the programming contest.

Everybody is welcome to attend this event, even those who couldn't attend Scala Conference in Japan 2013. We're aiming for a relaxed, no-pressure day of programming fun, so feel free to attend, no matter what your proficiency with Scala. All desks in the venue have electrical sockets and WiFi is available.

Date Time Sunday 3rd March 2013 10:00 - 18:10
Venue Tokyo Institute of Technology - Ookayama Campus

See in detail

Place(Main Building H101 Lecture Room

Main Building

The room is a little hard to find, so we will put signs up to guide you.

Attendees 100
Price Free
(Registration via Doorkeeper is required)

Timetable (tentative)

Date Time H101
10:00 - 10:20 Explanation about venue (by Kota Mizushima)
10:20 - 11:00 Coding
11:00 - 11:20 Break
11:20 - 12:00 Coding
12:00 - 13:30 Lunch Break
13:30 - 13:50 Talk 1 (tentative)
13:50 - 14:00 Break
14:00 - 14:40 Coding
14:40 - 15:00 Registration for Scala Programming Contest (about 10 people)
15:00 - 15:20 Talk 2 (tentative)
15:20 - 15:50 Coding
15:50 - 16:00 Break
16:00 - 17:10 Programming Contest - Demos and/or Presentations (about 5 minutes per person)
17:10 - 17:40 Programming Contest - Judging
17:40 - 18:00 Programming Contest - Results
18:00 - 18:10 Closing


  • All desks in the venue have electrical sockets and WiFi is available.
  • Lunch will NOT be provided, so please bring something with you.
  • You can come and go as you please, even outside of break times.
  • The timetable may be changed without notice

About the Scala Programming Contest

  • The registration for the contest will be done on the day.
  • Advance preparation for the contest is recommended.
  • Using Typesafe Stack (Scala, Akka, Play 2) is recommended.
  • Any kind of Scala program is OK. For example stand-alone programs, simple web services, or libraries are all fine.
  • Use of third-party libraries is not a problem.
  • There is no limit to the number of lines.
  • Judging will be done by the chairman, guest speakers, etc.

© 2012 - Scala Conference in Japan Committee