If I compare the total volume published in Canada, Australia and New Zealand and Singapore put together, Japan still produces more in English. At the end of the twentieth century, English is the everyday working language of thousands of medical doctors. Rather, English is a second language, a working language and, for some people, a primary language of publication. Japan is one of the major English-producing nations of the world. It's quite a surprise to me that it exists here.
Pidgins come about when speakers of language A and language B come into contact with each other.
Neither of them speak each other's language. Japan is teeming with pidgins. Just look at migration history. New language varieties emerged. Yokohama pidgin was used in the port of Yokohama in the 19th century.