Japanese anime has evolved throughout Heisei era started in January 1989. Back then, animators used traditional hand drawing technique. Now most films are made primarily with the help of digital technology to render computer generated (CG) animations in high definitions (HD).
It has only been 30 years, but Japanese anime industry has seen an enormous change.
1. "Kiki's Delivery Service (1989)" "Spirited Away (2001)"

SPIRITED AWAY (Japan 2001) Source: Mary Evans Picture Library/AAP
2. "Your Name." (2016)

Director Makoto Shinkai speaks at the 'Your Name' press conference at Montage Beverly Hills on December 5, 2016 in Beverly Hills, California. Source: Charley Gallay/Getty Images for Funimation
3. “Ghost in the Shell” (1995)
4. “Neon Genesis Evangelion”

Neon Genesis Evangelion Source: Gainax