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We discuss hadron-tomography studies for the nucleon and exotic hadrons byhigh-energy hadron reactions. First, the constituent-counting rule is explainedfor determining internal quark configurations of exotic-hadron candidates byscaling properties of high-energy exclusive cross sections. Next, possibilitiesare discussed for investigating the generalized parton distributions (GPDs) ofthe nucleon and exotic hadrons at J-PARC. In particular, we study hadronic $2\to 3$ process $p+p \to N+\pi+B$, exclusive Drell-Yan process, andexotic-hadron GPDs. For determining three-dimensional structure of unstableexotic hadrons, we consider $s$-$t$ crossed quantities of the GPDs calledgeneralized distribution amplitudes (GDAs), which can be investigated at KEKB.We explain possible studies of the GDAs by two-photon processes.

Hadron tomography studies by generalized parton distributions and distribution amplitudes