Sanriocore

Sanriocore is an aesthetic centered around Sanrio Co., Ltd.(株式会社サンリオ) a Japanese company created by Shintaro Tsuji that sells cute (or Kawaii) Japanese merchandise. Sanrio's most popular icon, Hello Kitty, has become one of the world's best-selling brands. Sanriocore focuses on the more popular Sanrio characters such as:

Hello Kitty
Pompompurin
My Melody
Kuromi
Little Twin Stars
Cinnamoroll
Wish Me Mell
Pochacco
Tuxedosam
My Sweet Piano
Gudetama
Keroppi

Visual

Sanriocore crosses over into multiple aesthetics such as Traumacore (the aesthetic can be used as a form of vent art in this case) but is closely related to Kidcore and Softie. It focuses on a gentle, childlike innocence and nature, accompanied by the cute Sanrio merch and characters.

Sanrio stickers
Pastel filters
Cherry blossoms
Sparkles
Rounded fonts
Speech bubbles
Pixelart
Desserts
Candy
Plushies

Fashion & Makeup

Sanriocore fashion pulls some elements from Pastel Goth, Yanderecore, Softie, and Larme Kei. Some fashion in this aesthetic can include:

Animal ear hairbands
Bow clips
Face stickers
Heavy blush
Bandaids
Sanrio print tops
Character-themed lolita outfits
Pastel sailor uniforms
Garters
Lace ankle socks
Loose socks
Platform shoes (mary janes, creepers)
Plush slippers
Small backpacks
Character goods (plushies, badges, etc)

Neutral looks with heavy blush can be seen, as well as pink, glittery eyeshadow with fake lashes. Pink lips or lip gloss with/without glitter seem popular as well. Nails tend to have heavy Sanrio deco.