|Dates||June 26th-27th, 2021|
|Venue||Ota Ward Industrial Plaza PiO|
|Address/City||1-20-20, Minamikamata 1-Chōme|
Kagaribi 4 was a Super Smash Bros. Ultimate supermajor held in Tokyo, Japan, from June 26th-27th, 2021. Due to a state of emergency as a result of a COVID-19 surge in Japan, the tournament was postponed twice, from an initial date of April 25th to May 22nd, then to the current date. With many of Japan's best players, including 17 of the 20 Japanese players on the Fall 2019 PGRU (everyone but T, Kirihara, and Ron), in attendance, Kagaribi 4 was the first supermajor since the start of the COVID-19 pandemic. All sets in the tournament were best of 5.
Super Smash Bros. Ultimate singles
|49th||Futari no Kiwami Ah~!|
- This tournament marks the worst placement for a number of players in an Ultimate tournament:
- This tournament marks the highest placement of a solo-Corrin player at a Japanese tournament, with Ly placing 17th.
- Each player in Losers' side Top 8 was sent to the Losers' bracket by a unique player in Winners' side Top 8.
- This tournament, Umebura SP 6, Let's Make Big Moves 2022, Kagaribi 7, and Kagaribi 8 are the only Ultimate majors to have a winner seeded outside of the top 16 (ProtoBanham was seeded 25th).
|Kagaribi · Kagaribi 3 · Kagaribi 4 · Kagaribi 5 · Kagaribi 6 · Kagaribi 7 · Kagaribi 8 · Kagaribi 9 · Kagaribi 10 · Kagaribi 11|