Japan uses metric system. So, please looking for an apartment or office space in Japan, the size is shown in square meter rather than square foot (in the US). So, if the space is 50 square meters, it is 538.195 square foot.
In addition to sum, Japan uses "TSUBO 坪" to show how large the space is. TSUBO is based on two Tatami Mat size. Two Tatami mats create a square space that is 3.3 square meters. That is 35.52 square feet.
You count each Tatami as one "jo 畳". So if the room has 6 Tatami, it is called 6 jo room. That will be 19.8 square meter or 213.13 square foot.
Since 1996, Japanese-Online has been provided as a free service from PSPinc with the purpose of providing resources to individuals interested in learning about the Japanese Language and culture.
Japanese-Online has content suited to varying levels of study, including lessons for beginners as well as lessons tailored for those who need grammar and writing resources. Lessons are best suited to those who have basic understanding of hiragana and katakana alphabets before moving on to the more advanced grammar and particle lessons. Grammar lessons focus on learning about writing and creating more complex sentences and most lessons will not use romaji (Japanese sounds written with roman letters). Kanji is used in the lessons with hiragana and English translations provided.