Japan

Hi, I'd tried to rewrite a section relate to Japan, but my English is quite limited. So could someone help to rewrite an article?

My suggestion is about Japanese streetname of the drug. 'Shabu' is a street name which is used by Yakuza, that name was not popular before ban of the drug. Before methamphetamine ban, 'Philopon' (ヒロポン) was the most popular name. 'Philopon' is a trademark of Dainippon Sumitomo Pharma (http://www.ds-pharma.co.jp/), former Dainippon Pharma (大日本製薬). And there are ads of Philopon which was sold over the counter (http://www.warbirds.jp/heiki/42000.htm).

Methamphetamine is the still number one illigal hard drug in Japan. Most common street name is 'speed' or 'S', and usually used by smoking. Methamphetamine regulation is very strict and difficult to use for medical purpose. (ADHD is treated with methylphenidate.)