"Bikkura Tamago" by Bandai.

Bandai Bikkura? Tamago – Asobi-Vehicle Bath Bomb: Connectable Shinkansen Vol.4 (75g)

The latest series of the popular Asobi-Vehicle Shinkansen bath bombs has arrived! Drop the bath bomb into the tub and watch it fizz – inside is one cool Shinkansen mascot figure. There are 10 different trains to collect, making bath time fun for train lovers of all ages. The bath water turns orange with a refreshing orange fragrance.

• Net Weight: 75g (bath bomb with mascot)
• Fragrance: orange
• Color: orange bath water
• 10 mascot types to collect: L0 Series Improved Test Train, E7 Kagayaki, E4 Max Toki, E5 Hayabusa, E6 Komachi, N700 Type A, 800 Tsubame, 923 Doctor Yellow, 0 Series Shinkansen, 300 Series Shinkansen

Mascot type is random and cannot be chosen.