Upcoming (online) tournaments

1.Summer Global Open (finished)
(or Winter if you are in the southern hemisphere)

It’s an open tournament, so everyone can register, provided that they are available at the designated time.

Info: http://tinyurl.com/summerglobalopen
Register: https://goo.gl/forms/UoKpGQeo3wIhNz4Y2
Tournament room: http://tenhou.net/0/?C10350560
– Group A: 1:00 UTC June 10 (until ~5:00)
– Group B: 13:00 UTC June 10 (until ~17:00)
– Final: 16:00 UTC June 11 (until ~18:00)

The tournament has finished. Congratz to tateniu for their victory!

2.The Invitational

Planned time: July 1st

Same as last year’s Osamuko Invitational, some of the best players in the English-speaking community will be invited to participate in this tournament. More info (players and teams) would be updated later.

My Discord server. Common mistakes (3)

Recently, I opened a new Discord server, with the purpose of having more quality discussions about the competitive aspect of the game.  This is for people who want to improve and learn how to be as good as they can possibly be, and as such not recommended for people who just enjoy playing the game casually. If this channel caters to your interests, join us at: Competitive Riichi Hub

I should as well make it clear that I do not encourage dividing the current community in any way. The purpose here is only to create the best environment for players that want to get good, enabling them to get to a certain level as easily as possible. This Discord server is not associated with osamuko.com by any means. Read More

Equipments for Tokujou

If you are a Tenhou player, you should have known that there are 4 different rooms for 4 different levels: Ippan, Joukyuu, Tokujou, Houou. Before getting to the main parts of this article, let’s see what those 4 levels are about – those descriptions are from the famous Riichi Book I, by Daina Chiba.

1. 一般 (ippan; lower-level room)
This is the only room where you can play initially. Games in this room can sometimes be a bit random, even chaotic at times. Some of the players in this room probably do not understand the rules very well. You very rarely come across strong players here.

2. 上級 (joukyuu; upper-level room)
You can play here if (1) your rank is 1 or higher or (2) you buy a two-month membership.
Games in the joukyu room are more reasonable than those in the lower-level room, but you still see many players who do not defend at all, do meaningless dama / unreasonable riichi, and make serious mistakes in maximizing tile efficiency.

In my impression, games at EMA tournaments most resemble games in the ippan and joukyuu rooms.

3. 特上 (tokujou; advanced room)
Requirements to play in this room are pretty demanding. You have to have a 四段 or higher rank and a 1800 or higher R. The latter requirement is particularly difficult to satisfy for intermediate players. As I wrote above, achieving the rank of 四段 is not that difficult, but satisfying the R ≥ 1800 condition requires that you take mahjong rather seriously. Since weak players are shut out from the tokujou room, games in tokujou are qualitatively different from those in the joukyu and ippan rooms. Games in this room feel similar to those you’d experience at regular mahjong parlors in Japan.

4. 鳳凰 (houou; phoenix room)
This is the highest-level room in Tenhou. In order to play in this room, you have to have all of the following: (1) a 七段 or higher rank, (2) a 2000 or higher R, and (3) a paid membership. Satisfying the first two conditions can be really, really challenging. This is arguably one of the highest-level mahjong locales in the whole world.


The article is mainly for Joukyuu players – my suggestion on what they could do to achieve Tokujou level. Including players that have reached Tokujou but drop back easily. (And yeah, there’d be article(s) about Tokujou players. Probably not as good as this one.)

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[cross post] International Mahjong Battle @ RTD

(Photos and various parts of this post are from http://mj-news.net/game-app/2017022860658)

in October of 2016, after finally planning my first ever trip to Japan with Daniel Moreno of PML, I emailed Shingo Tsunoda, creator of the online mahjong game Tenhou.net, to ask when the next Tenhou Real Trial would take place, however he did not know so I instead asked him if he would like to play mahjong with us. The original plan was just to meet in a Jansou and rent a table for a few hours but Tsuno had a different plan. He instead rented 3 tables at the RTD (Riichi Tsumo Dora) Lounge, a jansouesque lounge set up by Saikouisen professional Toshimasa Chou whose aim was to create a space to play mahjong that does not have the bad connotations that jansou have.

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An awesome video guide from the internet. Common mistakes (2)

First of all, I want to show you a really good video guide that was created recently. The author is DdR_Dan, a player from US, who is staying consistently at 6d on tenhou, even got 7d in the past. Although it’s a little long, in my opinion it’s one of the best guides out there for 1-3 dan players, or even 4-5. Be sure to check out this and other videos on his Youtube channel too!

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Common mistakes (1), plus my introduction

Hey there, I’m starfire, a.k.a amaika on tenhou.net. Some of you might have known me, some might not. I have played riichi since 2012. Now that I have become a decent player, 7d at the time posting this (even though I’m fully aware that I could drop back easily), and that the competitive part of the riichi community is not at a good state right now, I have decided to join the osamuko crew. My contents would definitely be not as good as xkime’s, but I hope that you readers can still find them useful! My posts will be written with the assumption that readers are familiar with the rules and common mahjong terms.

For my first post, I’d talk about some easily overlooked mistakes that are often committed by low-intermediate level players, including myself a lot of times.


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Good Players Club 7th Grand Champion Cup

Today’s the day; it’s time for Good Player Club’s 7th Grand Champion Cup. We’ve mentioned last year’s iteration in this blog.

Our long-time friend Benjamin Boas is participating as part of the mahjong-loving association Good Player’s Club, home to other famous players like Akagi’s creator Nobuyuki Fukumoto, Obaka Miko’s artist and writer Masayuki Katayama, and other famous figures from not only the mahjong and manga world, but TV and media as well.

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Professional Mahjong Commentary on Mondo in English!

MondoTV have uploaded 2 videos with English commentary by mahjong researcher Benjamin Boas and mahjong author Ryan Morris. Benjamin’s contribrutions to the community should be fairly well known to everyone, and Ryan’s less so. Ryan Morris is the author of the excellent but sadly now defunct “Japanese Mahjong for Dummies” guide, he has also wrote several articles in Japanese for Kindai Mahjong.

Please share, like and comment on the video to entice Mondo to create more content in English

Totori-sensei 19 years old wins the first season of Tenhoui vs Renmei

Photo from Ben and Deniz

This year JPML collaborated with Tenhou and hosted a 6 month long Tenhoui vs Renmei pro tournament. The first season used a Tenhou based ruleset with 50/20/0/70 uma, red fives, agari yame and tenpai yame.

Final Playoff Results
Rank Name Tenhoui # Total
1 Totorisensei 19sai 11 204.4
2 Naoki Setokuma N/A 127.6
3 Satoshi Fujisaki N/A 97.6
4 Doppo 3 86.9
5 Shuukatsusei@kawamuragundan 9 73.3
6 Hisato Sasaki N/A 60.5
7 Kanimajin 8 ▲21.6
8 Suzumekureijii 4 ▲83.2
9 Kenji Katsumata N/A ▲271.2
10 Naoya Maeda N/A ▲274.0

The 2nd season will start on the 23rd of December and will use JPML A rules. Yudai Maehara will replace Hisato Sasaki

Tentative Top 16 results from ERMC2016.

Hi there,

We saw a glitch occur on the ERMC website. We are publishing a table of the top 16 as we see them, with no claims on accuracy, quality, or perfection.

Henrik LETH
Sebastian LAVALLEE
Alexander SCHULER
Yixuan Liu
Philipp MARTIN