 Kọkọ parí gbólóhùn yìí: : 201718 Japan Championships, Yokoi pari kẹrin ni iṣẹlẹ ọdọ ati kẹjọ ni iṣẹlẹ agbalagba. Ní oṣù Kẹta, ó kópa nínú ìdíje 2018 World Junior Championships ní Sofia, Bulgaria. O gba ipo kẹjọ ninu kukuru ati kẹrin ninu ọfẹ, o pari ni ipo kẹfa lapapọ. 