One thing about Tokyo is that there is hardly anything to eat outside for brekkie apart from fast food places like Mc Dees, Yoshinoya and Sukiya.
Living in the UK and US, I enjoyed a plate of bangers n mash, scrambled eggs n toast n baked beans - meals that one could easily get at a cafe in the morning. If one wanted to eat breakfast like this (without having to cook it) in Japan, one needs to go to a hotel - the Cerulean in Shibuya does a good brekkie but costly.
I do enjoy brekkie in Singapore - just enter a food court and one is spoilt for choice as to what to choose. Wonton noodles with some milk tea please.
Back to Japan, at home we have a mix of fruit, bread, yogurt, cereal, rice n pickles, congee and the occasional bacon n eggs. I find it extremely difficult to get by without breakfast and would only skip it when having a health check because they require you to go on an empty stomach. I get the runs and skiddy pants if I ever do miss brekkie.
Do you regularly eat breakfast? if so what is your morning diet like?