Tsugumi Ohba is an anonymous writer known for creating the popular manga series Death Note. While their true identity and gender remain unknown to many fans, some speculate that they may be using a pseudonym such as Hiroshi Gamou. Despite this uncertainty, it's clear that Tsugumi Ohba spends a significant amount of time crafting intricate plots for their work, often while sitting in a chair with their knees bent, similar to the character L from Death Note. This information can be found on The VIZ English graphic novels profile.