It has been one of Kodansha’s hottest new Fantasy titles on Comic Days and KMANGA ever since its release last year. It is now preparing for the release of its first Tankobon volume in Japan. I am talking about Ryo Sumiyoshi’s Si Land, which goes on sale in ten days.
The first volume cover was teased December 10, 2025 on the manga’s Official Twitter Account, confirming that the front cover would feature Jean, a young dog in search of his mother, who vanished after their home was invaded by pirates. The back cover, which was later revealed features Zahab, the “Lion of the Ocean.” The first volume is set to go on sale on January 14, 2026 in Print and Digital. The Digital Edition will include newly drawn color illustrations & setting collections that couldn’t fit into the print edition due to page limitations, this was also confirmed by the manga’s social media post on December 16, 2025. If you are not familiar with Sumiyoshi’s work, he is known for past works such as MADK, Our Torsos Align: Human x Monster Love, ASHIDAKA -The Iron Hero, and most recently, Centaurs.
Si Land is drawn and illustrated by Ryo Sumiyoshi, it was first serialized in Kodansha’s Digital Manga Platform, Comic-Days on August 25, 2025 (also debuted at No. 1) and is currently ongoing, with chapters released every Monday. Kodansha also announced that Si Land would also be released as a Simulpub series in English on Kodansha’s KMANGA platform, chapters released every other Sunday.
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In a world where only dogs and cats exist, the dogs gained control of and built a kingdom on the only continent while the cats scattered throughout the great sea and repeatedly looted from the dogs. This mutual hatred has led to many years of strife between the two species… Jean, a young dog who was unconventionally born at sea and raised by a cat, lives with his mother Rosa and his adoptive father Azul as the three move from small island to small island. It is Jean’s dream to find a place where the three can live together permanently but…! From Ryo Sumiyoshi, the unparalleled master artist of non-human characters, comes an epic fantasy adventure on the high seas!
Source: Official Si Land Twitter (1,2)
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