At Metacritic, which assigns a weighted average score out of 100 to reviews from mainstream critics, Port Entropy received an average score of 71% based on 13 reviews, indicating "generally favorable reviews".[1]
Adam Kivel of Consequence of Sound gave the album a grade of B, saying, "It's a wonderful record of a musician and songwriter in his prime, but one that requires a willingness to go on a ride, with an open mind and a willingness to have some fun."[4] Mehan Jayasuriya of PopMatters gave the album 6 stars out of 10, saying, "While Port Entropy contains some of Tokumaru's most accomplished compositions yet, on the whole, it's a bit too monochrome for its own good."[7]