Japanese, unlike Chinese, is not at all tonal. It is very even/flat. One of the things Japanese first note among English speakers is their tendency to accentuate, as we sometime do in English.
This doesn't, of course, mean that Japanese never do WTF type intonation.
Let me try to do a rough approximation in print for Hiroshima. Say 'hero' pronouncing 'he' like we do the pronoun he
['hi' is approximate to the English 'he', as the vowel sound 'e' is represented in Japanese by the letter 'i'.
Are we clear so far?
Say 'ro' like the 'row' in row your boat but clip the last sound, don't draw it out as we do in English. And to say a Japanese 'r', [note where your tongue is when you say 'row' in English, low in the mouth and the tongue might touch the skin below the lower teeth gumline. Try some other English 'r' words and note the postion of the tongue. river - liver
To do a Japanese 'R', put your tongue at the intersection of the top teeth and the roof of your mouth, which is the placement for the English 'L'. But to do the Japanese 'R', don't let it linger there like we do for our L's, eg. 'law', just slap that point, do a quick tongue flap.
Do it a number of times and depending how how quickly and adroitly you move that big slab of meat, the tongue, you'll sometimes hear an 'L' sound' and you'll sometimes hear a 'R' sound, law raw
That's why many Westerners think Japanese can't say 'L'. Well of course they can't say 'L', Japanese doesn't have an 'L' sound but it has close to an 'L' sound and that is their slapped 'R' sound and it occurs because the placement of the tongue is the same position we use for 'L'. The only difference is the period of time that the tongue is allowed to linger at that position.
All that for two sounds, 'hi' and 'ro'. Whew!
'shi' like the English 'she' but again, not as drawn out as an English 'she'. 'ma' like "Hi Ma" or the English word 'maw' but clip the last sound. Whereas English people tend to pronounce each of the four syllables of Hiroshima separately, in Japanese, it's almost all smooshed together in one smooth sound.