Hi all,

PPT 2007 contains two slide master layouts called "Vertical Title and Text Layouts". These appear in the list of layouts when you view the slide masters, however, they DO NOT appear in the list of usable slide layouts when you are working in Slide View in PPT. If you do need to use these layouts, you will need to activate Japanese Language on your computer.

I just learned this yesterday and though it would be worth sharing, in the event that (like me), you wanted to use the layout but could not find it!

See this articale for more detail: Creating custom slide layouts