Tomoko Nagai was born in Aichi Prefecture in 1982. She graduated from Aichi Prefectural University of Fine Arts and Music in 2006, majoring in Oil Painting. She has held solo exhibitions in various locations, including Japan, Hong Kong, Taiwan, and Singapore. In addition, she has participated in joint exhibitions in Taiwan this year, "Playful Art" at UYart Gallery, Taichung and "Human Desire: The YANG ARTS Collection '' at Yang Art, Taipei.

Nagai’s artworks have been included in public collections both in Japan and internationally, notably Museum of Contemporary Art Tokyo (Japan), Aichi Prefectural Museum of Art, the Franks-Suss Collection (UK) and The JAPIGOZZI Collection (US / Switzerland), the Olbricht Collection (Germany). Nagai provided title designs and artworks for television programmes on NHK Educational, as well as created book covers for a range of publications.In collaboration with the esteemed Japanese gallery Tomio Koyama.

She held solo exhibition “Atelier in Peach and Rose Color, Magic” at 8/ ART GALLERY and Tomio Koyama Gallery in Tokyo, Japan, 2018, “Coloring Beyond the Edges” at Roppongi Hills A/D Gallery in Tokyo, Japan, 2019, "Spring and Weeping Cherry" at Gallery Ohrin and Izumo Taisha Hitachi Shrine in Ibaraki, Japan, 2020, “It’s Dazzling Softly Like Heaven, and,” at Toyokawa City Sakuragaoka Museum in Aichi, Japan, 2020, and “Botanical Holidays” at Mitsukoshi Contemporary Gallery in Tokyo, Japan, 2022.

Tomoko Nagai's art features carefree children, animals, and playful, colorful scenes, depicting everyone's growth stories, dreams, and intimate relationships. The delicate and rich colors, along with collage-like compositions, create a dramatic representation of childlike wonder, as if one were embarking on a fantastical journey through Alice's Wonderland, allowing the purest imagination to roam freely.

The artwork "Cat Hat" with its vibrant colors and diverse painting materials is like composing a musical piece, with a refreshing melody that stirs up the softest childhood memories and evokes the innocent dreams of youth. When observing the works of Nagai Tomoko, it's akin to reading a girl's diary filled with whimsical thoughts - sweet, dreamy, yet exquisitely real. The worlds within and outside the artwork interweave, allowing viewers to engage in intimate, soulful communication with the piece. "Cat Hat" was featured in the "Tell It Like It Is" exhibition at ISM Art Space in Shenzhen in 2022.