VfL Bochum was not the only club to miss out on signing Shio Fukuda, as STVV also had a strong interest in the 22-year-old Japanese attacker. The player joined Karlsruher, who finished tenth in the Second Bundesliga last season, on a loan deal from Borussia Mönchengladbach. In the 2025/2026 season, he scored 6 goals in 20 appearances in the 2. Bundesliga. Fukuda, who has 3 caps for the Japan U20 team, has a current market value of €1.00m. In June 2026, reports indicated his permanent transfer was agreed for a fixed fee of around €700,000, potentially rising to €1 million with add-ons.