Which innovative marketing campaign is credited with increasing Japan's Shinkansen bullet train ridership by 15% in 2019 by focusing on sustainability?

Test your knowledge about one of the most successful marketing campaigns in high-speed rail transportation history! As countries compete to develop faster, more efficient rail systems, marketing strategies have played a crucial role in passenger adoption. This question focuses on a landmark campaign that transformed public perception of train travel in a major market.

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The 'Green Tracks' campaign that highlighted the Shinkansen's carbon emissions being 1/8th that of air travel
The 'Speed Dating' campaign that offered singles-only cars on certain routes
The 'Time Machine' campaign that guaranteed arrival times or passengers received free tickets
The 'Floating Through Japan' campaign that emphasized the smoothness of magnetic levitation technology