The result of your conversion between Yard and tatami [Japan] appears here
To convert between Yard and Tatami [Japan] you have to do the following:
First divide ((0.003785411784/231)*1728)*27 / 1.62 = 0.47194744
Then multiply the amount of Yard you want to convert to Tatami [Japan], use the chart below to guide you.
Symbol: yds
No description
Symbol: tatami
No description