The episode received mixed reviews from the fan community and critics:
: Despite being the 400th episode, many fans were disappointed that it was a standard filler installment rather than a special celebration of the series' longevity. Where to Watch Watch Naruto Shippuden 400
Naruto Shippuden Episode 400, titled is a milestone installment that serves as part of the "In Naruto's Footsteps: The Friends' Paths" filler arc. Released in February 2015, the episode reflects on the themes of perseverance and hard work through the eyes of Rock Lee and a new character, Shira. Plot Summary The episode received mixed reviews from the fan
: Moved by their similar paths, Lee becomes enraged by those who belittled Shira. The episode culminates in a challenge between the two taijutsu specialists, born out of mutual respect and the "thrill of the fight". Critical Reception Plot Summary : Moved by their similar paths,
: Some viewers found the animation quality to be "stiff" or "blocky" compared to previous high-stakes episodes, a common critique for filler arcs occurring during the final stages of the main story.
: Reviewers from Anime News Network and Fandom Post noted that while the episode captures the core spirit of the series—overcoming odds through effort—it felt repetitive as it trod familiar ground already covered by Lee and Naruto's own backstories.
: Rock Lee encounters Shira, a ninja from the Hidden Sand who, like Lee, was originally barred from becoming a shinobi because he could only use taijutsu.