What will expired sencha japanese tea do to you?

fate stared me in the face. will a strange, poisonous fungus that has a taste only for sencha lead to horrific internal injury? back in 2007, (and this, is so far back that back then doing LBO analysis was still in vogue..sheesh) i bought this here packet of unspecified japanese loose leaf sencha (its obviously not sencha, im not sure what i was thinking) tea from those kind folk over at Harrods of London. Now most would say that it was safe to conclude that by now it had expired. Most but not all. Today i set out on a journey of scienfic enquiery - to determine, if indeed 3 year sencha is a) lethal b) good c) both of the above attached are photographs from the epic brewing. I did all my own stunts. The only precaution i did take was that i used boiling water today unlike my usual tea brews at c. 80c. oh, and it turned out, well just about OK. i feelt let down by the sheer normalcy of the tea (though perhaps a trifle weak)