The English alphabet is an imperfect tool for clearly and unmistakably representing the sounds of Japanese. For one thing, there are different systems of doing it. For another, it tends to make you read it as though you were reading English.
On a totally different note, many of us come from areas with local dialects or accents that are very dear to us, so we can certainly understand your fondness for expressing yourself in whatever flavor of English dialect you speak at home. However, it is not appropriate for a forum where people are from many areas and where many are not native English speakers. It helps everyone understand everyone else better if we all make our best effort to express ourselves here in clear English devoid of local dialect/slang.