TypeFaceConverter2 is a free and handy app that allows you to convert between over 30 different font types and sizes.

To start, you'll need to enter the characters you want to convert.

You can choose from various fonts, including ones that are common in Japan, such as Arial, Cursive, Times New Roman, etc. 

You can also choose from a number of different font sizes, from the smallest (like monotype) to the largest (like German Neue).

Once you've selected a font and size, you can add a background color and adjust the text alignment.

You can also add a line stroke and change the text stroke color.