You can type Japanese without Japanese keyboard. Just you need install MS-IME. Check IME is installed in your computer first. Click HERE
Translation for English to Japanese and Japanese English are available.→ Here
英語から日本語、日本語から英語の翻訳サービスいたします。→ここから
It's better to studay 10minutes everyday than to studay one hour once a week!! Continuous is Key to improve language.
Your language skill will make progress by not as 'how long' study but as 'how to study'