Satou Kazuma
 Japanese 佐藤 和真
 Romaji Satō Kazuma
 Alias Billionaire Adventurer (成金冒険者 Narikin Bōken-sha)
• Characteristics•
 Race Human
 Gender Male
 Age 17 (current)
16 (former)
20 (web novel)
 Hair Color Brown
 Eye Color Green
• Professional Status•
 Affiliation Kingdom of Belzerg
 Occupation Adventurer
• Personal Status•
 Status Alive
• Debuts•
 Light Novel Volume 1
 Manga Chapter 1
 Anime Episode 1
• Portrayal•
 Japanese Voice Fukushima Jun (anime)
Oosaka Ryouta (Drama CD)

Satou Kazuma (佐藤(さとう) 和真(かずま)) is the main protagonist of the KonoSuba series. He was reincarnated to the fantasy world after dying.


Kazuma is a young man of average height and weight. He has short and slightly spiky chestnut-brown hair and green eyes. His usual outfit consists of a gold-trimmed green mantle, white shirt, pants and leather boots. He initially wore a green tracksuit.


Prior to his new life in the Fantasy World, Kazuma was a hikikomori, thus isolating himself from society and spending all his time in his room playing video games, all while maintaining little to no relationships outside. Some of these traits would manifest from time to time in the Fantasy World, such as becoming extremely nervous when first meeting the beautiful Darkness and resigning himself to lazing around under his kotatsu at all times.

After coming to the Fantasy World, Kazuma becomes much more social and outgoing, and was initially excited at the prospect of becoming an adventurer. Despite this however, Kazuma becomes increasingly pessimistic about his new life as he discovers the harsh reality of being an adventurer, such as the low pay and life-threatening work.

Throughout the series, Kazuma is consistently sarcastic, cynical, and blunt, especially towards his own teammates. He has no qualms with reminding Aqua of how useless she can be or how creepy he finds Darkness’s masochism. This doesn’t just extend to his teammates, as he is also open about his disdain narcissistic individuals like Mitsurugi Kyouya|. Kazuma tends to openly complain about the unfortunate situations he gets in, such as when he falls into debt, in which he generally becomes even more irritable and depressed.

Though the most unassuming member of the group, Kazuma is often described as someone who is "reliable at critical moments." As such, he can be surprisingly intelligent as well as a good leader, often being the one who comes up with the plans or lead the group. Despite his abrasive attitude, Kazuma has a kind heart, as he does genuinely enjoy his time with his party and is willing to do whatever it takes to ultimately help them. Even in his original world, Kazuma showed some semblance of bravery as he was willing sacrifice his life to save a girl he truly thought was in danger, even stating after he died that he was fine with his fate as long the girl was safe (though later it’s revealed she was in no harm in the first place, to Kazuma’s embarrassment).

But while he can be brave, Kazuma possesses some less heroic attributes as well. He is quite lecherous, and often presents himself as an “advocate of gender equality” as an excuse for him to attack and harass girls by stealing their panties. He also uses this to justify him retreating a dangerous battle before the women. Along with this, Kazuma was perfectly content with living the rest of his life as a lazy bum after earning enough money to live comfortably, essentially abandoning his initial quest to defeat the Demon King.


When in elementary school, his first love and childhood friend had promised to marry him. However, during the summer of his third year in middle school, he saw that same girl riding a delinquent upperclassman’s bike. Unable to say anything, he no longer wanted to attend school and immersed himself in net gaming.

As Kazuma gradually cut down his sleeping time and focused his efforts to exterminate monsters all the time in games, people who knew his name became fewer and fewer. One day after going outside he died attempting to save a girl from being hit by an incoming truck. The truck was, in fact, a slow-moving tractor, but thinking that he was run over, Kazuma died from shock.


Luck: Kazuma has an extraordinary high luck stat, so high that even Luna was surprised. However, she claims that its numerical value isn't really essential to an adventurer.

Intelligence: His statistical intelligence is decently high. In practical use, he is very cunning and sharp, often employing the usage of unorthodox tactics.


  • Kazuma's birthday is around summertime, as he celebrated his birthday soon after the Summer Eris Thanksgiving Festival.
  • Compared to the rest of the main cast whose levels hover in the mid-thirties, his level is still in the teens as of the latest light novel.