Tea – Which Type of Japanese Green Tea Has the Highest Amount of Caffeine

Green tea is not to everyone's taste. You can try adding honey instead of sugar. As honey has more of a distinct flavour than just sugar it may help mask the green tea flavour more successfully. Another suggestion is to add some mint leaves if you're a fan of mint. If you're drinking green tea solely for health reasons the mint can be excellent for aiding digestion.

Certain tea companies also sell 'light' green tea. This can be more palatable, especially for people like yourself who don't like the taste of steeped green tea so changing your brand of tea might be helpful.

It may be that with perseverance you may acquire a taste for green tea (I personally used to hate camomile tea but continued to drink it every day and now it's my favourite).

Rate Tea tells us this is a myth:

Many tea companies, and even some reputable entities such as the U.S. Department of Agriculture, have made misleading generalizations about the caffeine content of broad classes of tea. It is a widespread myth that black tea contains more caffeine than green tea, and another myth that white tea contains the least caffeine of all teas.

They indicate that brewing method is the main determiner of caffeine levels in the brewed tea.

The source article goes on to cite various credible scientific sources, which raise the credibility of this assertion. Unfortunately, most of their links have gone bad, which makes it harder to check the background science.

This caffeine level table from Mayo Clinic does indicate slightly different levels, but that is likely to be a result of different brewing details across tea types rather than fundamental to the tea plant itself.