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The decays $\bar{B} \rightarrow D^{(*)} \tau^- \bar{\nu}_\tau$ are goodprobes to new physics beyond the Standard Model. The ratios of branchingfractions $R(D^{(*)}) \equiv \mathit{BF}(\bar{B} \rightarrow D^{(*)} \tau^-\bar{\nu}_\tau) / \mathit{BF}(\bar{B} \rightarrow D^{(*)} \ell^-\bar{\nu}_\ell)$ (where $\ell^- = e^-, \mu^-$) measured by Belle, BaBar andLHCb show 3.9$\sigma$ deviation from the SM expectations as of 2015. In 2016,the Belle collaboration has shown two new measurements for the $\bar{B}\rightarrow D^{(*)} \tau^- \bar{\nu}_\tau$ decay. These include the firstapplication of the semileptonic tagging to the $R(D^*)$ measurement and thefirst measurement of the $\tau$ polarization using the hadronic $\tau$ decays.We also review the two measurements for $B^- \rightarrow \tau^- \bar{\nu}_\tau$at Belle. Along with these results, compatibility with the type-IITwo-Higgs-Doublet Model is discussed.

$\bar{B} \rightarrow D^{(*)} \tau^- \bar{\nu}_\tau$ and Related Tauonic Topics at Belle