Publisher Hakusensha has announced the legend behind "Berserk" Kentaro Miura died on the 6th of this month due to heart problems. Rest in Peace.

Edit, found this translation, not good but will give you an idea:

To our readers
Information
At 14:48 on May 6, 2011, cartoonist Kentaro Miura.
He passed away due to aortic solution. He was 54 years old.
We would like to express our deep gratitude to all the readers who gave him his lifetime for reading the works of Professor Miura, including "Berserk".
We would like to inform you of the death report.
The editorial staff would like to express our utmost gratitude to Professor Miura.
We pray for the souls from the bottom of my heart.
We would also like to express our deepest sympathies to the bereaved families. In addition, let me report that the farewell ceremony was held by my family.
Please.
Unpublished book As soon as it is decided about the future, it will be renewed
We will announce it on Young Animal magazine and the official website.
Hakusensha Co., Ltd. Young Animal Editorial Department
I still have something to remember. When I was still a child, when I was impressed to see the old Keem of "Belselk", "I'll give you that name."
Mr. Miura was there. It was just that I was afraid of that, but now I feel like I understand. The teacher really loved to think about new things. He was exaggerated, not he, but a boy who loved to talk about ideas he came up with. He enjoyed books, movies and anime every day and was used as a material for making. In such a teacher's work, the favorite things and human relationships that he saw and heard in his life are packed like living things. "It's going to be life" many times
Thank you. Thank you very much, Professor Miura. Finally to everyone. The teacher was immediately taken down and protected, but I would like to report that he fell. And please.
I'm hurt. Please refrain from contacting her affiliates. We would like to express our deepest gratitude for the teacher's contributions and pray for his honor.
Young Animal Line
Immediately after joining the company, I still remember how impressed she was that "Berserk" was created with this hand. I was in charge of that, and every time I had a meeting, it was interesting that I couldn't believe any of the ideas of the story that was told like "I have an idea ..." The most important thing was to let me know that everything I do leads to manga. She said she was active for another thirty years to get the idea out of her head, but she suddenly broke up and was very lonely. Three teachers, she really helped me. Thank you.
Young Animal Ryo Takamura