> 
> かたい帯を上手に結ぶことができない若い女性が多い**ため**、柔らかい帯を去年より３０％増やしたと言っています。
> 
> 
> 

From
<http://www3.nhk.or.jp/news/easy/k10010984931000/k10010984931000.html>

I would translate it as follows (without ため):

> 
> They say that there are many young women who can't tie a hard Obi, from last year the number of soft obi has increased by 30%.
> 
> 
> 

I can't find an entry on jisho on ため and I can't remember having seen it on my textbook either :/