4-koma
Yonkoma manga (4コマ漫画, "four cell manga", or 4-koma for short), a comic-strip format, generally consists of gag comic strips within four panels of equal size ordered from top to bottom. (They also sometimes run right-to-left horizontally or use a hybrid 2x2 style, depending on the layout requirements of the publication in which they appear.) Though the word yonkoma comes from the Japanese, the style also exists outside Japan in other Asian countries as well as in the English-speaking market (particularly in mid-20th century United States strips, where Peanuts popularized the format;[1] most strips there, including the last several years of Peanuts, have since moved to a three-panel format).
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Official Announcement

Hi all

As we announced previously, we have removed all reading features from the website.

Now when you visit each title’s info page, you can no longer read scanlations. Instead, we have added a feature that links each title in Manga Rock to an official content provider’s site (like Comixology, or viz.com etc.) where you can support the original authors and their work.

Disclaimer:  We do not receive any referral fee from any of your purchases.

In the meantime, our team is still working hard on project “MR Comics” where we hope to make comics more accessible to everyone — we will share details with you soon.

If you have any questions or need help (membership, account etc.), please contact  support@mangarock.com