[5] Fukashi was scheduled to make the first defense of his BigBang title against Kouzi at Bigbangă»Touitsu he no michi sono 21 on June 7, 2015.
[9] Fukashi was scheduled to make his first WPMF Japan title defense against Nobu Bravely at KODO 1 on January 24, 2016.
Fukashi scored the sole knockdown of the fight in the fifth round, when he dropped Mizumatchi with a low kick.
[14] Fukashi was scheduled to face Hachimaki for the REBELS Red Super Lightweight championship at REBELS.47 on November 30, 2016.
The knockout was preceded by two knockdowns during the fifth round, as Fukashi dropped his opponent with a flying knee and a head kick.
[16] Fukashi was scheduled to face the WBC Muaythai Japan and Innovation Super Lightweight champion Hiroto Yamaguchi at KNOCK OUT vol.1 on February 12, 2017.
He won the fight by a fourth-round technical knockout, after Motegi's corner threw in the towel at the 0:53 minute mark.
[30] Fukashi advanced to the tournament finals, held at KNOCK OUT SUMMER FES.2018 on August 19, 2018, where he faced Hideki.
[33] Fukashi was scheduled to face Chadd Collins at KNOCK OUT 2019 WINTER THE ANSWER IS IN THE RING on February 11, 2019.
[35] Fukashi was scheduled to face the reigning Shootboxing Lightweight champion Renta Nishioka in a non-title bout at SHOOT BOXING 2019 act.2 on April 27, 2019.
[38] Fukashi suffered a cut above his right eye in the third round, after Sasaki hit him with the spinning back fist, which prompted the referee to call in the ringside doctor.
[39] Although Fukashi complained that he was hit with the forearm instead of the back of the fist, both the referee and K-1 producer Takumi Nakamura deemed the strike to have been legal.
[44] Fukashi called out the reigning K-1 Super lightweight champion Rukiya Anpo during his post-fight interview.
[50] Fukashi was scheduled to face Hayato Suzuki at K-1 World GP 2020 Winter's Crucial Bout on December 13, 2020.
[52] Fukashi was scheduled to face the reigning K-1 super lightweight champion Hideaki Yamazaki in a non-title bout at K-1: K'Festa 4 Day 1 on March 21, 2021.
[53] Yamazaki won the fight by a first-round knockout, stopping Fukashi with a jab at the 1:10 minute mark of the bout.
[54] Fukashi was scheduled to face the journeyman Yosuke Tamura at K-1 World GP 2021 in Fukuoka on July 17, 2021.
[55] Fukashi won the fight by a first-round technical knockout, successfully dropping Tamura thrice before the second minute of the round had elapsed.
[56] Fukashi was scheduled to face the former K-1 lightweight champion Kenta Hayashi at K-1 World GP 2021 in Osaka on December 4, 2021.
[59] He won the fight by a third-round technical knockout, forcing Kojima's corner to throw in the towel at the 2:15 minute mark of the last round.
[62] Fukashi faced the former K-1 Lightweight champion Kenta Hayashi in a rematch at K-1 World GP 2022 in Osaka on December 3, 2022.