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Riku Kawasaki

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Riku Kawasaki is a Competitive Programmer from Japan and is notable from reaching the World Rank 2 on CodeForces (as on March 2021) and being an Algorithmic Finalist at Topcoder Open 2019.

His age is 20 years as of 2021.

He started Competitive Coding in 2016 and has reached the top in just 5 years. Riku Kawasaki is a student at University of Tokyo. He started in 2016 and is giving a tough competition to Gennady Korotkevich in 2021.

Achievements of :

  • 1 Gold (2017) and 1 Silver (2016) medal at International Olympiad in Informatics (IOI)
  • Algorithmic Finalist at Topcoder Open 2019
  • 2nd World Rank at CodeForces in March 2021
  • Delegation member for Japan in 2019 at International Olympiad in Informatics (IOI)


As per ratings, he is just after Gennady Korotkevich who has a rating of 3572. Riku has a rating of 3555.

He was the highest rated user at Codeforces without a single Codeforces Round win. He bagged 7 times second position at CodeForces competitions before finally winning in October 2020.

He said he started Competitive Coding to get into IOI but he clearly, mastered the art and has reached the top.

He is not active on other platforms. He is ranked at 203 Worldwide and 13 in Japan on CodeChef platform.


maroonrk is his username.

The choice comes from the fact that:

  • RK is the initials of his name "Riku Kawasaki"
  • He is a fan of Maroon 5, a pop band and hence, the choice of "maroon".

Find Riku on web

Find Riku Kawasaki at:

  • @maroonrk at CodeForces
  • @maroonrk at CodeChef
  • @maroon_kuri at Topcoder
OpenGenus Tech Review Team

OpenGenus Tech Review Team

The official account of OpenGenus's Technical Review Team. This team review all technical articles and incorporates peer feedback. The team consist of experts in the leading domains of Computing.

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Improved & Reviewed by:

Aditya Chatterjee Aditya Chatterjee
Riku Kawasaki
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