Come share your stories at ScalaMatsuri 2020!

We are excited to announce that ScalaMatsuri will be held on May 15th (Friday) and 16th (Saturday), 2020 at Tokyo International Exchange Center.
Please submit your talk for the general sessions.
For 2020 edition, we are adding a new track to increase more talks for Scala beginners, making the total to four tracks, of which two will have professional interpreters translating to/from English-Japanese at real time.
The CFP will close at 2020, February 1st (Saturday) 23:59 Anywhere on Earth (or Feb 2, 20:59 JST).

Matsuri, meaning festival, is about time and space out of the everyday.
It’s about mustering up the courage to do something cool (even though we are normally shy).
We want to make it a fun experience, regardless of gender, race, and many different backgrounds.
All participants, including speakers and sponsors, are asked to be respectful to each other and follow the code of conduct.

As one of largest international Scala conferences in Asia, we want to make it a fun event for both the domestic audience and those visiting Japan from overseas.


For ScalaMatsuri 2020, the speakers will be determined using 2 methods:

  • Voting by participants
  • Recommendation by the program committee

Voting by participants: We will conduct a ballot by ScalaMatsuri participants.
Talks will be selected based on the number of votes.
During the selection we might also consider the buzz on social networks such as Twitter and Facebook into account.

Recommendation by the program committee: The program committee will be made up by experts who are in tune with the Scala ecosystem and the recent trends.
The committee is tasked to pick various ranges of talks to make the conference more fun for everyone including advanced talks, foundational talks, and talks suited for new learners of Scala.

Application details

  • Any topic interesting Scala beginners or Scala community is welcome.
  • The session length are 40 min and 100 min (includes 20 min recess).
  • The format may be the regular lecture format, hands-on workshop format, hackathon, or whatever you can think of.
  • The talk must be in either English or Japanese. All slides must be in English. Note that we will prepare Japanese subtitles.
  • The abstract must be 300 characters or fewer. We might ask for a longer overview once the talk is accepted.
  • Pick 3 keywords that could help voters get an idea of your talk. The keywords will be displayed on the talk list.
  • You are allowed up to 3 submissions. However, we'll ask you to select 1 talk even if multiple talks qualified.
  • Please note that if you exceed any of the limits, the staff may edit your submissions at our discretion.
  • If you would like to modify your submissions, please send a pull request to this repository.

Note again that ScalaMatsuri organizers will need to prepare the subtitles, so you are asked to submit the slides weeks in advance.

Travel grant

ScalaMatsuri wants diverse speakers from all over the world.
To help break down the barriers, we’re excited to offer travel grant.

Because ScalaMatsuri is run by a non-profit association, the travel grant must only be used for something that we can file as an expense.

Here are the categories that is ok:

  • Airfare and other transportation to Tokyo.
  • Other transportation during ScalaMatsuri
  • Hotel fares during ScalaMatsuri sessions.

Any other expenses, including ones incurred from sightseeing or hotel fares (priced per person in Japan) for accompanying travellers, cannot be expensed by us.

We’ll accept expense requests after ScalaMatsuri for a month. All items must have either an email forward from an airline or scans/photos of a receipt.
If you need earlier financial support, we will do our best to accommodate you.

The maximum amount of the travel grant is fixed by the origin of your travel:

  • Working adult: Domestic: 500 USD Overseas: 1000 USD
  • Student: Domestic: 750 USD Overseas: 1500 USD

Note that the amount offered as travel grant will NOT exceed the actual travel expense.
Suppose you’ve been approved for the grant and the travel expense was $1500 from Europe, the maximum amount the ScalaMatsuri will reimburse will be $1000.
If you started from somewhere in Asia and it cost $700, the reimbursement will be $700.
Students are given larger maximum amount of $750 for domestic and $1500 for overseas.
In the application, please include the year you’re in (for example, D4 for fourth year doctorate student).

Your expenses will NOT be accepted in the event that you do not attend the conference.
At the sole discretion of ScalaMatsuri, some expenses may be reimbursed upon a natural disaster, death or illness of the speaker or a family member.
We suggest you purchase travel insurance if these terms are not sufficient.