Remaining close friends, they both worked under a company called Fujiko Productions and based their studios in adjoining buildings. Abiko concentrated on work incorporating more black humor while Fujimoto focused on works for tweens. According to Abiko,[citation needed] the cause for the dissolution of the partnership was due to Fujimoto discovering he had liver cancer and heart disease in 1986, and the desire of both Fujimoto and Abiko to settle issues of copyright and finances before Fujimoto's death in 1996.