In japan and i had to put my hand in a train station toilet to retrieve some jewellery. there was no soap or hot water. how likely am i to get hep a?

Not likely: If you didn't put your dirty hands in your mouth & found a place to wash your hands well with soap prior to handling food it's not likely. Hepatitis A is transmitted via ingestion of contaminated food & water or via direct contact with an infectious person. Safe water supply, food safety, good sanitation, hand washing & the hepatitis A vaccine are the best ways to combat the disease. Be well!