Boktai: The Sun is in Your Hand is an action-adventure role-playing video game released by Konami for the Game Boy Advance in 2003, and the first game in the Boktai series. The player takes the role of Django, a vampire hunter, who uses a weapon called the "Gun Del Sol", that fires bolts of sunlight at enemies. The game made novel use of a light sensor on the cartridge which encouraged playing parts of the game in direct sunlight. The game was produced and designed by Hideo Kojima.

Hideo Kojima is a Japanese video game designer. He is regarded as an auteur of video games. He developed a strong passion for film and literature during his childhood and adolescence. In 1986, he was hired by Konami, for which he designed and wrote Metal Gear (1987) for the MSX2, a game that laid the foundations for stealth games and the Metal Gear series, his best known and most appreciated works. At Konami, he also produced the Zone of the Enders series, as well as wrote and designed Snatcher (1988) and Policenauts (1994), graphic adventure games regarded for their cinematic presentation.