Hard to say because a lot of the planners after were credited on Splatoon 3 for the first time.

Game Design
Yoshihiko Ito (EPD)
Tadanori Sakata (EPD)
Taketoshi Akimaru (EPD)
Kenta Usui (EPD)
Tomo Tanaka (EPD)
Takahiro Iwasaki (EPD)
Ryosuke Ogata (EPD)
Kuniko Maeda (EPD)
Tomoaki Tsuji (EPD)
Kotaro Nakagami (EPD)
Tsuyoshi Masada (EPD)
Tomokazu Abe (EPD)
Takuya Matsunobu (EPD)
Yuichiro Ito (EPD)
Hiromu Takemura (EPD)
Ryo Arai (New EPD Hire??)
Hiroya Shikano
Koki Takata
Honami Hada
Takamitsu Shibaoka
Rio Masuda
Masatoshi Morimoto
Ririna Yasufuku
Takumi Fujihara
Kohei Hayashi
Aimi Ayashiro
Naoki Inoue
Yoki Omura
Takahiro Ono
Ayaka Onoda
Riwa Kunitake
Tomohiro Hirao (Mario Club)
Ikuri Matsuo (Mario Club)
Rika Yamamoto

Sound
Toshiyuki Sudo (EPD)
Shu Tamura (EPD)
Toru Minegishi (EPD)
Ryo Nagamatsu (EPD)
Tomohiro Imura (EPD)
Shiho Fujii (EPD)
Kota Okumura (EPD)
Yumi Takahashi (EPD)
Kairi Hamada (EPD)
Isami Yoshida (EPD)
Asuka Hayazaki (EPD)
Masato Ohashi (EPD)
Yuki Ito (EPD)

Programming
Takuya Kobayashi (EPD)
Toshikazu Kiuchi (EPD)
Kenichi Nishida (EPD)
Soichi Nakajima (EPD)
Yukihiko Ito (EPD)
Arisa Kitani (EPD)
Kenji Tatsuta (EPD)
Takuto Asaka (EPD)
Kazuhide Ueda (EPD)
Seiichi Yamaguchi (EPD)
Yusuke Morimoto (EPD)
Issei Takahashi (EPD)
Shinya Nakagawa (EPD)
Irene Gersenowies Jasso (EPD)
Hideki Kaneko (EPD)
Yuma Takenaga
Keisuke Hattori
Yuichihiro Bito (EPD)
Ryo Meguro
Saki Nakashima (SRD)
Shinji Okuda (SRD)
Manabu Ide
Kento Yamada
Atsushi Sakaguti (SRD)
Takashi Yoshimi (SRD)
Shinpei Kiwada
Shohei Yokosawa
Kimihiko Shimomura
Yasunari Umano
Keisuke Kikura
Ryo Takahashi
Keita Hamamatsu
Daisuke Nakamura
Koya Ohashi
Keishi Asa
Takumi Masuda
Yu Nishikawa
Kojiro Taguchi
Takayuki Hama
Masayuki Kimura
Takahiro Bando
Yoshito Ueyama
Takeshi Wakasugi
Kazuki Cho
Makoto Kitsuki
Takashi Fujinaga

Art
Hito Matsudaira (New EPD from Platinum)
Akane Kamiya (EPD)
Reiya Nagae (New EPD from Polyphony/Sony)
Nanaka Kumazawa (EPD)
Sho Murata (EPD)
Haruka Tatsuta (EPD)
Riku Takamatsu (EPD)
Akari Mine (EPD)
Kanoko Kobayashi (EPD)
Mari Miki (EPD)
Boku Kondo (EPD)
Mei Minagawa (EPD)
Momo Hirai (New EPD?)
Hikari Miura (New EPD? Former HAL? ?)
Takayuki Yanagisawa (New EPD? or Digital Frontier)
Takehisa Taketoshi (EPD)
Hiroki Yamada
Shohei Imamura (EPD)
Yusuke Suzuki (EPD)
Maki Yashiro
Masahiro Harada
Mayu Furukawa (EPD)
Kazumi Yamaguchi (EPD)
Jun Tanaka (EPD)
Maasa Sugimoto (EPD)
Shogo Shimada (EPD)
Taigo Hamaguchi
Tomoki Hirayama
Miu Morita
Miki Aoki (EPD)
Yoshiki Takada
Hanaka Tahara
Yusuke Sugiyama
Ren Kudo
Haruna Noda (EPD)
Shintaro Sasaki (EPD)
Yuki Ishizuka
Kohei Ishida
Takuro Shimizu (EPD)
Akito Osanai (EPD)
Takeshi Koike (EPD)
Dairi Hayakawa
Riwano Ikeda
Atsushi Miyagi (EPD)
Koji Sonoyama (EPD)
Takeru Fukada (EPD)
Saria Suga (EPD)
Sota Ueki
Youngseok Kong (EPD)
Yume Shiratori
Makoto Ota (EPD)
Hiroshi Ueda (EPD)
Momoka Yamamoto (EPD)
Daichi Nonaka (EPD)
Kyosuke Fujita
Shiji Wu (EPD)
Shumpei Yamashita (New EPD hire from SQEX)
Kei Fujii
Kaho Sawada (EPD)
Shigeki Yoshida (EPD)
Kurena Ura (EPD)
Tomoka Kishida
Yuri Takai (EPD)
Ayane Fujita
Ooi Chun Gee (Bandai-Namco Studios Singapore)
Luis Esteves (Bandai-Namco Studios Singapore)
Melcolm Lek (Bandai-Namco Studios Singapore)
Lai Si Min (Namco-Bandai Studios Singapore)
Sam Choon Tatt (Namco-Bandai Studios Singapore)
Kelly Yang Jia Jing (Namco-Bandai Studios Singapore)
Andrea Ow Jia Ern (Namco-Bandai Studios Singapore)
Alex Ong Geng Biao (Namco-Bandai Studios Singapore)
Chiong Ee Jun (Namco-Bandai Studios Singapore)
Chong Pick Chean (Namco-Bandai Studios Singapore)
YaoFeng Zeng (Namco-Bandai Studios Singapore)
Guan Benp Yeap (Namco-Bandai Studios Singapore)
Jocelyn Low (Namco-Bandai Studios Singapore)
Leong Hong Ching Chuck (Namco-Bandai Studios Singapore)
Hoon Jie Ling (Namco-Bandai Studios Singapore)
Daryl Wong (Namco-Bandai Studios Singapore)
ChengChan Tey (Namco-Bandai Studios Singapore)
Monica Lee (Namco-Bandai Studios Singapore)
Wong Yu Ping (Namco-Bandai Studios Singapore)
Ge Jian Han Benny (Namco-Bandai Studios Singapore)
Chew Wen Wei (Namco-Bandai Studios Singapore)
Aloysius Ho (Namco-Bandai Studios Singapore)
Arist Xiong (Namco-Bandai Studios Singapore)
Wendell Wong Wan-Qing (Namco-Bandai Studios Singapore)
Carlson Wong (Namco-Bandai Studios Singapore)
Adrick Leong (Namco-Bandai Studios Singapore)
Ling Swee Hee (Namco-Bandai Studios Singapore)
Kong Sue Ying (Namco-Bandai Studios Singapore)
Jonathan Choo (Namco-Bandai Studios Singapore)
Tan Zhe Chean (Namco-Bandai Studios Singapore)
Herman Yani (Namco-Bandai Studios Singapore)
Koo JingLer (Namco-Bandai Studios Singapore)
Fong Chen Chia (Namco-Bandai Studios Singapore)
Lim Kok Yien (Namco-Bandai Studios Singapore)
Ryan Yap Zi Qing (Namco-Bandai Studios Singapore)
Chan Man Yew (Namco-Bandai Studios Singapore)
Hawa Najihah (Namco-Bandai Studios Singapore)
Naoaki Ishiada (Namco-Bandai Studios Singapore)
Akiko Hasegawa (Namco-Bandai Studios Singapore)
Kazuhiro Watanabe (Namco-Bandai Studios Singapore)
Marina Amano (Namco-Bandai Studios Singapore)
Nami Kano (Namco-Bandai Studios Singapore)
Jun Osone (Namco-Bandai Studios Singapore)
Miki Toyota (Agni-Flare)
Narumi Harata (Agni-Flare)
Shoko Toba
Lim Chee Wai (Monolith)
Shinji Yato (Monolith)
Yuji Watanabe (Monolith)
Kanako Uno
Jun Kitaoka
Ayumi Yamazaki
Fumiya Ito
Yuhei Iwasa
Naoki Uemura
Shoji Kanehira
Hiroko Kiyonari
Shinya Cima
Takaaki Koido
Natsuo Komatsubara
Haruka Saito
Ayaka Sugimoto (Monolith)
Tomo Yamanaka (Monolith)
Mai Yuguchi (Monolith)
Hiyori Sawabe
Yo Nakajima
Risa Sakai
Yuji Asano (Digital Media Lab)
Masahito Nishiura (Digital Media Lab)
Yuki Higashiguchi (Digital Media Lab)
Takahiro Fujimoto (Digital Media Lab)
Hajime Saito (Digital Media Lab)
Haruyo Ogawa (Digital Media Lab)
Yukako Abe (Digital Media Lab)
Nina Takizawa (Digital Media Lab)
Jumpei Takahashi (Digisite Graphics)
Akiho Aiba (Digisite Graphics)
Rei Kobayashi (Digisite Graphics)
Yusuke Osada (Digisite Graphics)
Maki Kawamata (Digisite Graphics)
Ryouya Kato (Digisite Graphics)

Debug
Daiki Moriyama
Atsushi Takeda
Yoshiki Sugai
Minori Ishida
Ayari Naiki
Kenta Hamamoto
Mario Club Co., Ltd.
DIGITAL Hearts Co., Ltd.

Special Thanks
Toshiharu Izuno
Takeshi Kawasaki
Hiroki Minami
Takashi Ohwaki
Tan Ken Ho
Koh Yong Qiang
Aidan Au Chong Weng
Shuhei Banya
Kenzo Nagata
Nik Shazwan
Chin Mei Len
Teo Hui Xin
Ng Kai Wern
Hadi Al-Hayyo
Michiyo Hamada
Shunsuke Kamada
Jinya Kitsui
Takeshi Inaba
Arugo Shinohara
Hiroshi Uchiyama
Shinji Yamada
Yoshinori Yamazoe
Takahisa Yamamoto
Philippe Phothisane
Shogo Takaki
SRD Co., Ltd.
Bandai Namco Studios - Singapore & Malaysia
Digital Media Lab., Inc.
Agni-Flare Co., Ltd.
Monolith Software Inc.

Producer
Hisashi Nogami

General Producer
Shinya Takahashi
Katsuya Eguchi

Executive Producer
Shuntaro Furukawa

I will include tags below.

Directors

Yoshiteru Fukuda
Kenji Matsumoto
Seita Inoue
Shintaro Sato

Game Design

Yoshihiko Ito
Tadanori Sakata
Taketoshi Akimaru
Kenta Usui
Tomo Tanaka
Takahiro Iwasaki
Ryosuke Ogata
Kuniko Maeda
Tomoaki Tsuji
Kotaro Nakagami
Tsuyoshi Masada
Tomokazu Abe
Takuya Matsunobu
Yuichiro Ito
Hiromu Takemura
Ryo Arai
Hiroya Shikano
Koki Takata
Honami Hada
Takamitsu Shibaoka
Rio Masuda
Masatoshi Morimoto
Ririna Yasufuku
Takumi Fujihara
Kohei Hayashi
Aimi Ayashiro
Naoki Inoue
Yoki Omura
Takahiro Ono
Ayaka Onoda
Riwa Kunitake
Tomohiro Hirao
Ikuri Matsuo
Rika Yamamoto

Sound

Toshiyuki Sudo
Shu Tamura
Toru Minegishi
Ryo Nagamatsu
Tomohiro Imura
Shiho Fujii
Kota Okumura
Yumi Takahashi
Kairi Hamada
Isami Yoshida
Asuka Hayazaki
Masato Ohashi
Yuki Ito

Programming

Takuya Kobayashi
Toshikazu Kiuchi
Kenichi Nishida
Soichi Nakajima
Yukihiko Ito
Arisa Kitani
Kenji Tatsuta
Takuto Asaka
Kazuhide Ueda
Seiichi Yamaguchi
Yusuke Morimoto
Issei Takahashi
Shinya Nakagawa
Gersenowies Jasso Irene
Hideki Kaneko
Yuma Takenaga
Keisuke Hattori
Yuichihiro Bito
Ryo Meguro
Saki Nakashima
Shinji Okuda
Manabu Ide
Kento Yamada
Atsushi Sakaguti
Takashi Yoshimi
Shinpei Kiwada
Shohei Yokosawa
Kimihiko Shimomura
Yasunari Umano
Keisuke Kikura
Ryo Takahashi
Keita Hamamatsu
Daisuke Nakamura
Koya Ohashi
Keishi Asa
Takumi Masuda
Yu Nishikawa
Kojiro Taguchi
Takayuki Hama
Masayuki Kimura
Takahiro Bando
Yoshito Ueyama
Takeshi Wakasugi
Kazuki Cho
Makoto Kitsuki
Takashi Fujinaga

Art

Hito Matsudaira
Akane Kamiya
Reiya Nagae
Nanaka Kumazawa
Syo Murata
Haruka Tatsuta
Riku Takamatsu
Akari Mine
Kanoko Kobayashi
Mari Miki
Boku Kondo
Mei Minagawa
Momo Hirai
Hikari Miura
Takayuki Yanagisawa
Takehisa Taketoshi
Hiroki Yamada
Shohei Imamura
Yusuke Suzuki
Maki Yashiro
Masahiro Harada
Mayu Furukawa
Kazumi Yamaguchi
Jun Tanaka
Maasa Sugimoto
Shogo Shimada
Taigo Hamaguchi
Tomoki Hirayama
Miu Morita
Miki Aoki
Yoshiki Takada
Hanaka Tahara
Yusuke Sugiyama
Ren Kudo
Haruna Noda
Shintaro Sasaki
Yuki Ishizuka
Kohei Ishida
Takura Shimizu
Akito Osanai
Takeshi Koike
Dairi Hayakawa
Riwano Ikeda
Atsushi Miyagi
Koji Sonoyama
Takeru Fukada
Saria Suga
Sota Ueki
Youngseok Kong
Yume Shiratori
Makoto Ota
Hiroshi Ueda
Momoka Yamamoto
Daichi Nonaka
Kyosuke Fujita
Shiji Wu
Shumpei Yamashita
Kei Fujii
Kaho Sawada
Shigeki Yoshida
Kureka Ura
Tomoka Kishida
Yuri Takai
Ayane Fujita
Ooi Chun Gee
Luis Esteves
Melcolm Lek
Lai Si Min
Sam Choon Tatt
Kelly Yang Jia Jing
Andrea Ow Jia Ern
Alex Ong Geng Biao
Chiong Ee Jun
Chong Pick Chean
YaoFeng Zeng
Guan Benp Yeap
Jocelyn Low
Leong Hong Ching Chuck
Hoon Jie Ling
Daryl Wong
ChengChan Tey
Monica Lee
Wong Yu Ping
Ge Jian Han Benny
Chew Wen Wei
Ho Aloysisus
Arist Xiong
Wendell Wong Wan-Qing
Carlson Wong
Adrick Leong
Ling Swee Hee
Kong Sue Ying
Jonathan Choo
Tan Zhe Chean
Herman Yani
Koo JingLer
Fong Chen Chia
Lim Kok Yien
Ryan Yap Zi Qing
Chan Man Yew
Hawa Najihah
Naoaki Ishiada
Akiko Hasegawa
Kazuhiro Watanabe
Marina Amano
Nami Kano
Jun Ohsone
Miki Toyota
Narumi Harata
Shoko Toba
Lim Chee Wai
Shinji Yato
Yuji Watanabe
Kanako Uno
Jun Kitaoka
Ayumi Yamazaki
Fumiya Ito
Yuhei Iwasa
Naoki Uemura
Shoji Kanehira
Hiroko Kiyonari
Shinya Cima
Takaaki Koido
Natsuo Komatsubara
Haruka Saito
Ayaka Sugimoto
Tomo Yamanaka
Mai Yuguchi
Hiyori Sawabe
Yo Nakajima
Risa Sakai
Yuji Asano
Masahito Nishiura
Yuki Higashiguchi
Takahiro Fujimoto
Hajime Saito
Haruya Ogawa
Yukako Abe
Nina Takizawa
Jumpei Takahashi
Akiho Aiba
Rei Kobayashi
Yusuke Osada
Maki Kawamata
Ryoya Kato

Debug

Daiki Moriyama
Atsushi Takeda
Yoshiki Sugai
Minori Ishida
Ayari Naiki
Kenta Hamamoto
Mario Club Co., Ltd.
DIGITAL Hearts Co., Ltd.

Special Thanks

Toshiharu Izuno
Takeshi Kawasaki
Hiroki Minami
Takashi Ohwaki
Tan Ken Ho
Koh Yong Qiang
Aidan Au Chong Weng
Shuhei Banya
Kenzo Nagata
Nik Shazwan
Chin Mei Len
Teo Hui Xin
Ng Kai Wern
Hadi Al-Hayyo
Michiyo Hamada
Shunsuke Kamada
Jinya Kitsui
Takeshi Inaba
Arugo Shinohara
Hiroshi Uchiyama
Shinji Yamada
Yoshinori Yamazoe
Takahisa Yamamoto
Philippe Phothisane
Shogo Takaki
SRD Co., Ltd.
Bandai Namco Studios - Singapore & Malaysia
Digital Media Lab., Inc.
Agni-Flare Co., Ltd.
Monolith Software Inc.

Producer

Hisashi Nogami

General Producer

Shinya Takahashi
Katsuya Eguchi

Executive Producer

Shuntaro Furukawa