Loppi is a municipality in Finland. It is located in the province of Southern Finland and is part of the Tavastia Proper region. Loppi was founded in 1632. The municipality has a population of and covers an area of of which is water. The population density is . The municipality is unilingually Finnish. Neighbour municipalities are Hyvinkää, Hämeenlinna, Janakkala, Karkkila, Riihimäki, Tammela and Vihti.
Loppi (Japanese: ロッピー) is Japan's most popular self-service electronic ticket dispensing system, providing instant print tickets in venues such as museums. Tickets are typically printed and paid for at the store's counter, which also allows people who do not own credit or debit cards to purchase their tickets.
The system was originally developed and is still owned by the Lawson chain of convenience stores ( Konbini) and also is used to provide couponing and rewards systems. The name Loppi is an abbreviation of Lawson online shopping.