Google faced a similar battle when its founders made the tough decision to layer an agnostic search service with paid ads, and balancing such a service for a consumer market has remained an algorithmic challenge for Google ever since.

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The decision to include cancer has added another layer of complexity to the law's implementation, Kushlefsky said.

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Will Hitachi-MHI, like many merged Japanese companies (Mizuho Bank is a prominent current example), being unable to reduce staff, simply layer on management levels that slow decision-making and dull competitiveness?

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Still, until a decision is made, some parents and school officials bemoaned the additional layer of stress.

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