Hong Kong (CNN) -- Japan seems to be seeing some splendid days. This past week the Nikkei 225 hurdled over the 14,500 mark and near a five-year high, while the yen weakened beyond the 100-yen mark against the dollar and to a four-year low. If that wasn't enough, Japan's exporters have started to pick up the black pen to report earnings where only red had been used in the past several years -- Sony this week revealed its first full-year net profit in five years. With investors and exporters feeling the cash surge, the potential for change is at hand but challenges still lie in wait. Analysts warn that parts of Japan Inc. are still very much on the brink.
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Weaker Japanese yen boosting equities, exporter profits, investor sentiment
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Sony reported first annual profit in five years; Toyota reported $9.7B annual profit
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Fitch: Japan tech will not benefit enough from weaker yen for return to competitiveness
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Analyst: Japan auto sector challenged by China politics, S. Korea, U.S. competition
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