A series of notes regarding the Japanese box office, and the presentation on the site.

Conversion
The yen to dollar conversions for a film's total gross are done according to the exchange rate for the month the film was released. Converting the budget is done in the same manner in order to best compare the two figures. Conversions are always rounded because of the fluctuating exchange rate. Dollar figures are never converted back to a yen amount on any figures on the site.

Yen vs. the Dollar
The conversion rate between the Japanese yen and the American dollar can differ monumentally between a gap of only a year, or even a month sometimes. Because of this it's better to take note of the yen figures given for each film as opposed to the US dollar figures, as they are a more stable way of tracking how well a film is doing. For example: Godzilla, Mothra & King Ghidorah: Giant Monsters All-Out Attack (2001) would have earned around $20 million by the end of its theatrical run, but by the 2004 conversion rate that total would be bumped to around $25 million.

Rough Figure
This term, seen in parenthesis on the site, denotes when a yen or dollar figure has been rounded.

Country
The country in parentheses behind a figure, or date, correspond to which country that figure applies to. For example, Godzilla (1954) states the marketing budget as "¥37,106,545 / $600,000 (Japan)" and the Japan in parentheses denotes that this figure applies to the marketing of the Japanese theatrical release.