Doctor Syakuei Yoshiyama (好山錫兵博士 Yoshiyama Shakuhei hakase) is a young mathematician and biologist that, in the year 1999, felt in love with an artificial life-form (C-Life) that he created in a computer. Somehow he managed to enter the computer world to stay with his loved one, and the half human, half C-Life Pulseman was born from their union.
- The name Yoshiyama means "pleasant mountain", and Shakuhei means "Tin Soldier".
- It is believed that Yoshiyama and Doc Waruyama are the same person, Yoshiyama becoming evil due to spending a long time in the computer world. Although the two have similar names and appearance, no official source confirmed that they are the same person.