I know I can't win but it's great to just participate and share.
Singapore Zoo:
1.Blue poison dart frog
Dendrobates tinctorius
2.River toad
Phrynoidis asper
3.Oriental fire bellied newt
Cynops orientalis
4.Malayan horned frog
Megophrys nasuta
River safari:
5. Chinese giant salamander
Andrias davidianus
I will go to one or two more zoos so I can get double figures.
Ueno Zoo:
1. Long nosed horned frog (Megophrys nasuta)
2. False tomato frog(Dyscophus guineti)
3. Green tree frog(Litoria caerulea)
4. Bell’s horned frog(Ceratophrys onnata)
5. Oriental fire bellied toad(Bombina orientalis)
6. Budgett’s frog (Lepidobatrachis laevis)
7. Suriname toad (Pipa pipa)
8. African bullfrog (Pyxicephalus adspersus)
9. Golden mantilla (Mantella aurantiaca)
10. Yellow headed poison frog (Dendrobates leucomelas)
11. Spanish ribbed newt (Pleurodeles waltl)
12. Mexico salamander(Ambystoma mexicanum)
13. Greater siren (siren lacertina)
14. Three-toed amphima(Amphiuma tridactylym)
15. Tokyo salamander (Hynobius tokyonesis)
16. Tohoku salamander (Hynobius lichenatus)
17. Tokyo daruma pond frog (Pelophylax porosus)
18. Kajika frog(Buergeria buergeri)
19. Forest green tree frog (Rhacophorus arboreus)
20. Eastern Japanese common toad (Bufo japonicus)
21. Schlegel’s green tree frog (Rhacophorus schlegelii)
22. Japanese tree frog(Hyla japonica)
23. American bull frog (LIthobates catesbeianus)
24. Japanese giant salamander(Andrias japonicus)
TSLP:
25. Japanese fire bellied newt
(Cynops pyrrhogaster)
26. Japanese brown frog(Rana japonica)
27. Wrinkled frog(Rana rugosa)
So my total is 32 now.