There does not seem to be an 'official' dictionary. However, there are some dictionaries regarded as more comprehensive than others, and dictionary publishing in Japan remains, to this day, as a highly competitive business.
Unlike other languages, Japanese (and Chinese as well) has two main types of dictionaries:
1. Language dictionaries
2. Chinese character dictionaries
Among language dictionaries, the most comprehensive ones would probably be:
* []{}, the most complete reference work;
* []{}, regarded as the most authoritative. This one probably has the highest number of citations.
Among character dictionaries, the most famous one would be []{}; it is so comprehensive that it can somewhat double as a Chinese-language (character) dictionary too.