The most common way to contract words in Japanese is to take the first two characters (AKA kana) of each of the first two words (excluding particles) and combine them.
A number of SCANDAL songs with titles in Japanese are rather long and can be tedious to type them out, so just as an FYI, here's how to properly shorten the titles of a few of their songs (which are also used by Japanese fans and as well as SCANDAL themselves):
Awanai Tsumori no, Genki de ne = AwaTsumo
(会わないつもりの、元気でね = 会わつも)
Onegai Navigation = OneNavi
(お願いナビゲーション = おねナビ)
Kimi to Yoru to Namida = KimiYoru
(キミと夜と涙 = キミ夜)
Koi no Gestalt Houkai = KoiGes
(恋のゲシュタルト崩壊 = 恋ゲシュ)
Koisuru Universe = KoiUni
(恋するユニバース = 恋ユニ)
Konya wa Pizza Party = KonyaPizza/KonPizza
(今夜はピザパーティー = 今夜ピザ/今ピザ)
SCANDAL BABY = SCABABY/BABY
(スキャベイビー/ベイビー)
Scandal Nanka Buttobase = ScaButto
(スキャンダルなんかブッ飛ばせ = スキャブット)
Shunkan Sentimental = ShunSen
(瞬間センチメンタル = 瞬セン)
Taiyou Scandalous = TaiSca/TaiScan
(太陽スキャンダラス = 太スキャ/太スキャン)
Taiyou to Kimi ga Egaku STORY = TaiKimi
(太陽と君が描くSTORY = タイキミ)
Uchiage Hanabi = UchiHana
(打ち上げ花火 = 打ち花)
A number of SCANDAL songs with titles in Japanese are rather long and can be tedious to type them out, so just as an FYI, here's how to properly shorten the titles of a few of their songs (which are also used by Japanese fans and as well as SCANDAL themselves):
Awanai Tsumori no, Genki de ne = AwaTsumo
(会わないつもりの、元気でね = 会わつも)
Onegai Navigation = OneNavi
(お願いナビゲーション = おねナビ)
Kimi to Yoru to Namida = KimiYoru
(キミと夜と涙 = キミ夜)
Koi no Gestalt Houkai = KoiGes
(恋のゲシュタルト崩壊 = 恋ゲシュ)
Koisuru Universe = KoiUni
(恋するユニバース = 恋ユニ)
Konya wa Pizza Party = KonyaPizza/KonPizza
(今夜はピザパーティー = 今夜ピザ/今ピザ)
SCANDAL BABY = SCABABY/BABY
(スキャベイビー/ベイビー)
Scandal Nanka Buttobase = ScaButto
(スキャンダルなんかブッ飛ばせ = スキャブット)
Shunkan Sentimental = ShunSen
(瞬間センチメンタル = 瞬セン)
Taiyou Scandalous = TaiSca/TaiScan
(太陽スキャンダラス = 太スキャ/太スキャン)
Taiyou to Kimi ga Egaku STORY = TaiKimi
(太陽と君が描くSTORY = タイキミ)
Uchiage Hanabi = UchiHana
(打ち上げ花火 = 打ち花)